231257071831 has 8 divisors (see below), whose sum is σ = 241351778304. Its totient is φ = 221165703000.

The previous prime is 231257071817. The next prime is 231257071841. The reversal of 231257071831 is 138170752132.

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 231257071831 - 2⁹ = 231257071319 is a prime.

It is a super-3 number, since 3×231257071831³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231257071841) 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, 692295 + ... + 970456.

It is an arithmetic number, because the mean of its divisors is an integer number (30168972288).

Almost surely, 2^231257071831 is an apocalyptic number.

231257071831 is a deficient number, since it is larger than the sum of its proper divisors (10094706473).

231257071831 is a wasteful number, since it uses less digits than its factorization.

231257071831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668821.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 231257071831 in words is "two hundred thirty-one billion, two hundred fifty-seven million, seventy-one thousand, eight hundred thirty-one".