531631005261 has 16 divisors (see below), whose sum is σ = 717390369024. Its totient is φ = 350158823424.

The previous prime is 531631005247. The next prime is 531631005337. The reversal of 531631005261 is 162500136135.

It is not a de Polignac number, because 531631005261 - 2¹¹ = 531631003213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531631005761) 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, 1415205 + ... + 1751018.

It is an arithmetic number, because the mean of its divisors is an integer number (44836898064).

Almost surely, 2^531631005261 is an apocalyptic number.

It is an amenable number.

531631005261 is a deficient number, since it is larger than the sum of its proper divisors (185759363763).

531631005261 is a wasteful number, since it uses less digits than its factorization.

531631005261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3166900.

The product of its (nonzero) digits is 16200, while the sum is 33.

The spelling of 531631005261 in words is "five hundred thirty-one billion, six hundred thirty-one million, five thousand, two hundred sixty-one".