Search a number
-
+
31212010 = 253121201
BaseRepresentation
bin111011100010…
…0000111101010
32011201201211101
41313010013222
530442241020
63032552014
7526204054
oct167040752
964651741
1031212010
1116689055
12a55260a
13660a85b
1442068d4
152b1800a
hex1dc41ea

31212010 has 8 divisors (see below), whose sum is σ = 56181636. Its totient is φ = 12484800.

The previous prime is 31212001. The next prime is 31212037. The reversal of 31212010 is 1021213.

It can be written as a sum of positive squares in 2 ways, for example, as 30371121 + 840889 = 5511^2 + 917^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 3121201 = 31212010 / (3 + 1 + 2 + 1 + 2 + 0 + 1 + 0).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1560591 + ... + 1560610.

Almost surely, 231212010 is an apocalyptic number.

31212010 is a deficient number, since it is larger than the sum of its proper divisors (24969626).

31212010 is a wasteful number, since it uses less digits than its factorization.

31212010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121208.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 31212010 is about 5586.7709815241. The cubic root of 31212010 is about 314.8525723144.

Adding to 31212010 its reverse (1021213), we get a palindrome (32233223).

The spelling of 31212010 in words is "thirty-one million, two hundred twelve thousand, ten".

Divisors: 1 2 5 10 3121201 6242402 15606005 31212010