5256388391 has 8 divisors (see below), whose sum is σ = 5317007904. Its totient is φ = 5195953440.

The previous prime is 5256388373. The next prime is 5256388441. The reversal of 5256388391 is 1938836525.

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 5256388391 - 2¹⁴ = 5256372007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5256388331) 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, 11561 + ... + 103181.

It is an arithmetic number, because the mean of its divisors is an integer number (664625988).

Almost surely, 2^5256388391 is an apocalyptic number.

5256388391 is a deficient number, since it is larger than the sum of its proper divisors (60619513).

5256388391 is a wasteful number, since it uses less digits than its factorization.

5256388391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92281.

The product of its digits is 1555200, while the sum is 50.

The square root of 5256388391 is about 72500.9544144075. The cubic root of 5256388391 is about 1738.7179959768.

The spelling of 5256388391 in words is "five billion, two hundred fifty-six million, three hundred eighty-eight thousand, three hundred ninety-one".