5251611287 has 24 divisors (see below), whose sum is σ = 6055030800. Its totient is φ = 4536829440.

The previous prime is 5251611271. The next prime is 5251611359. The reversal of 5251611287 is 7821161525.

It is not a de Polignac number, because 5251611287 - 2⁴ = 5251611271 is a prime.

It is a super-2 number, since 2×5251611287² = 55158842219491592738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5251611287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5251611217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 514964 + ... + 525062.

It is an arithmetic number, because the mean of its divisors is an integer number (252292950).

Almost surely, 2^5251611287 is an apocalyptic number.

5251611287 is a deficient number, since it is larger than the sum of its proper divisors (803419513).

5251611287 is a wasteful number, since it uses less digits than its factorization.

5251611287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10323 (or 10310 counting only the distinct ones).

The product of its digits is 33600, while the sum is 38.

The square root of 5251611287 is about 72468.0018145940. The cubic root of 5251611287 is about 1738.1911098607.

The spelling of 5251611287 in words is "five billion, two hundred fifty-one million, six hundred eleven thousand, two hundred eighty-seven".