8531979251 has 4 divisors (see below), whose sum is σ = 8610254400. Its totient is φ = 8453704104.

The previous prime is 8531979229. The next prime is 8531979257. The reversal of 8531979251 is 1529791358.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8531979251 - 2⁶ = 8531979187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8531979251.

It is not an unprimeable number, because it can be changed into a prime (8531979257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39137411 + ... + 39137628.

It is an arithmetic number, because the mean of its divisors is an integer number (2152563600).

Almost surely, 2^8531979251 is an apocalyptic number.

8531979251 is a deficient number, since it is larger than the sum of its proper divisors (78275149).

8531979251 is a wasteful number, since it uses less digits than its factorization.

8531979251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78275148.

The product of its digits is 680400, while the sum is 50.

The square root of 8531979251 is about 92368.7135939437. The cubic root of 8531979251 is about 2043.3837258667.

The spelling of 8531979251 in words is "eight billion, five hundred thirty-one million, nine hundred seventy-nine thousand, two hundred fifty-one".