8531256042 has 64 divisors (see below), whose sum is σ = 19464192000. Its totient is φ = 2768517360.

The previous prime is 8531256037. The next prime is 8531256043. The reversal of 8531256042 is 2406521358.

8531256042 is a `hidden beast` number, since 8 + 53 + 1 + 2 + 560 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 8531255988 and 8531256006.

It is not an unprimeable number, because it can be changed into a prime (8531256043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 475959 + ... + 493557.

It is an arithmetic number, because the mean of its divisors is an integer number (304128000).

Almost surely, 2^8531256042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8531256042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9732096000).

8531256042 is an abundant number, since it is smaller than the sum of its proper divisors (10932935958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8531256042 is a wasteful number, since it uses less digits than its factorization.

8531256042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17848 (or 17842 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 8531256042 is about 92364.7987168272. The cubic root of 8531256042 is about 2043.3259887652.

The spelling of 8531256042 in words is "eight billion, five hundred thirty-one million, two hundred fifty-six thousand, forty-two".