Search a number
-
+
312020023 = 7172622017
BaseRepresentation
bin10010100110010…
…000110000110111
3210202010021000011
4102212100300313
51114334120043
650543401051
710506061240
oct2246206067
9722107004
10312020023
11150144297
12885b3187
134c848c43
142d621cc7
151c5d559d
hex12990c37

312020023 has 8 divisors (see below), whose sum is σ = 377570592. Its totient is φ = 251713536.

The previous prime is 312020017. The next prime is 312020029. The reversal of 312020023 is 320020213.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (312020017) and next prime (312020029).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-312020023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312019985 and 312020012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312020029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1310890 + ... + 1311127.

It is an arithmetic number, because the mean of its divisors is an integer number (47196324).

Almost surely, 2312020023 is an apocalyptic number.

312020023 is a deficient number, since it is larger than the sum of its proper divisors (65550569).

312020023 is a wasteful number, since it uses less digits than its factorization.

312020023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622041.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 312020023 is about 17664.0885131387. The cubic root of 312020023 is about 678.2567973153.

Adding to 312020023 its reverse (320020213), we get a palindrome (632040236).

The spelling of 312020023 in words is "three hundred twelve million, twenty thousand, twenty-three".

Divisors: 1 7 17 119 2622017 18354119 44574289 312020023