231231161339551 has 8 divisors (see below), whose sum is σ = 231361783452800. Its totient is φ = 231100570373400.

The previous prime is 231231161339491. The next prime is 231231161339557. The reversal of 231231161339551 is 155933161132132.

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 231231161339551 - 2⁴⁷ = 90493672984223 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 (231231161339557) 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, 7073110 + ... + 22638268.

It is an arithmetic number, because the mean of its divisors is an integer number (28920222931600).

Almost surely, 2^{231231161339551} is an apocalyptic number.

231231161339551 is a deficient number, since it is larger than the sum of its proper divisors (130622113249).

231231161339551 is a wasteful number, since it uses less digits than its factorization.

231231161339551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15573549.

The product of its digits is 437400, while the sum is 46.

The spelling of 231231161339551 in words is "two hundred thirty-one trillion, two hundred thirty-one billion, one hundred sixty-one million, three hundred thirty-nine thousand, five hundred fifty-one".