2551123531 has 8 divisors (see below), whose sum is σ = 2785011264. Its totient is φ = 2317563720.

The previous prime is 2551123511. The next prime is 2551123543. The reversal of 2551123531 is 1353211552.

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 2551123531 - 2⁷ = 2551123403 is a prime.

It is a super-2 number, since 2×2551123531² = 13016462540843815922, which contains 22 as substring.

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 2551123531.

It is not an unprimeable number, because it can be changed into a prime (2551123511) 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, 65565 + ... + 96958.

It is an arithmetic number, because the mean of its divisors is an integer number (348126408).

Almost surely, 2^2551123531 is an apocalyptic number.

2551123531 is a deficient number, since it is larger than the sum of its proper divisors (233887733).

2551123531 is a wasteful number, since it uses less digits than its factorization.

2551123531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163961.

The product of its digits is 4500, while the sum is 28.

The square root of 2551123531 is about 50508.6480812940. The cubic root of 2551123531 is about 1366.3978275943.

The spelling of 2551123531 in words is "two billion, five hundred fifty-one million, one hundred twenty-three thousand, five hundred thirty-one".