231920651919 has 96 divisors (see below), whose sum is σ = 366553845504. Its totient is φ = 129262210560.

The previous prime is 231920651917. The next prime is 231920651939. The reversal of 231920651919 is 919156029132.

It is not a de Polignac number, because 231920651919 - 2¹ = 231920651917 is a prime.

It is a super-2 number, since 2×231920651919² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231920651917) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 88619499 + ... + 88622115.

It is an arithmetic number, because the mean of its divisors is an integer number (3818269224).

Almost surely, 2^231920651919 is an apocalyptic number.

231920651919 is a deficient number, since it is larger than the sum of its proper divisors (134633193585).

231920651919 is a wasteful number, since it uses less digits than its factorization.

231920651919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885 (or 2866 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 48.

The spelling of 231920651919 in words is "two hundred thirty-one billion, nine hundred twenty million, six hundred fifty-one thousand, nine hundred nineteen".