Search a number
-
+
8142952931 = 311907137743
BaseRepresentation
bin1111001010101101…
…11001100111100011
3210000111101212110022
413211112321213203
5113134043443211
63424003424055
7405534646361
oct74526714743
923014355408
108142952931
1134a9537073
1216b308502b
139ca045559
1457367a631
15329d36bdb
hex1e55b99e3

8142952931 has 8 divisors (see below), whose sum is σ = 8410097664. Its totient is φ = 7876087560.

The previous prime is 8142952907. The next prime is 8142952943. The reversal of 8142952931 is 1392592418.

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

It is a cyclic number.

It is not a de Polignac number, because 8142952931 - 214 = 8142936547 is a prime.

It is a super-2 number, since 2×81429529312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8142952901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9755 + ... + 127988.

It is an arithmetic number, because the mean of its divisors is an integer number (1051262208).

Almost surely, 28142952931 is an apocalyptic number.

8142952931 is a deficient number, since it is larger than the sum of its proper divisors (267144733).

8142952931 is a wasteful number, since it uses less digits than its factorization.

8142952931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139681.

The product of its digits is 155520, while the sum is 44.

The square root of 8142952931 is about 90238.3118802651. The cubic root of 8142952931 is about 2011.8424836371.

The spelling of 8142952931 in words is "eight billion, one hundred forty-two million, nine hundred fifty-two thousand, nine hundred thirty-one".

Divisors: 1 31 1907 59117 137743 4270033 262675901 8142952931