561571373231 has 16 divisors (see below), whose sum is σ = 623964902400. Its totient is φ = 501130912800.

The previous prime is 561571373227. The next prime is 561571373261. The reversal of 561571373231 is 132373175165.

It is a cyclic number.

It is not a de Polignac number, because 561571373231 - 2² = 561571373227 is a prime.

It is a super-2 number, since 2×561571373231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561571373261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1391111 + ... + 1748808.

It is an arithmetic number, because the mean of its divisors is an integer number (38997806400).

Almost surely, 2^561571373231 is an apocalyptic number.

561571373231 is a deficient number, since it is larger than the sum of its proper divisors (62393529169).

561571373231 is a wasteful number, since it uses less digits than its factorization.

561571373231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140230.

The product of its digits is 396900, while the sum is 44.

The spelling of 561571373231 in words is "five hundred sixty-one billion, five hundred seventy-one million, three hundred seventy-three thousand, two hundred thirty-one".