5257731391 has 32 divisors (see below), whose sum is σ = 6151541760. Its totient is φ = 4445548800.

The previous prime is 5257731383. The next prime is 5257731397. The reversal of 5257731391 is 1931377525.

It is not a de Polignac number, because 5257731391 - 2³ = 5257731383 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 (5257731397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4034446 + ... + 4035748.

It is an arithmetic number, because the mean of its divisors is an integer number (192235680).

Almost surely, 2^5257731391 is an apocalyptic number.

5257731391 is a deficient number, since it is larger than the sum of its proper divisors (893810369).

5257731391 is a wasteful number, since it uses less digits than its factorization.

5257731391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767.

The product of its digits is 198450, while the sum is 43.

The square root of 5257731391 is about 72510.2157699176. The cubic root of 5257731391 is about 1738.8660633855.

The spelling of 5257731391 in words is "five billion, two hundred fifty-seven million, seven hundred thirty-one thousand, three hundred ninety-one".