5631791531 has 4 divisors (see below), whose sum is σ = 5660971992. Its totient is φ = 5602611072.

The previous prime is 5631791513. The next prime is 5631791537. The reversal of 5631791531 is 1351971365.

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 5631791531 - 2²⁶ = 5564682667 is a prime.

It is a super-2 number, since 2×5631791531² = 63434151697286647922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5631791537) 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 3 ways as a sum of consecutive naturals, for example, 14589941 + ... + 14590326.

It is an arithmetic number, because the mean of its divisors is an integer number (1415242998).

Almost surely, 2^5631791531 is an apocalyptic number.

5631791531 is a deficient number, since it is larger than the sum of its proper divisors (29180461).

5631791531 is a wasteful number, since it uses less digits than its factorization.

5631791531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29180460.

The product of its digits is 85050, while the sum is 41.

The square root of 5631791531 is about 75045.2632149425. The cubic root of 5631791531 is about 1779.1621199637.

The spelling of 5631791531 in words is "five billion, six hundred thirty-one million, seven hundred ninety-one thousand, five hundred thirty-one".