231913326 has 32 divisors (see below), whose sum is σ = 469244160. Its totient is φ = 76406976.

The previous prime is 231913307. The next prime is 231913327. The reversal of 231913326 is 623319132.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231913293 and 231913302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231913327) 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, 251895 + ... + 252813.

It is an arithmetic number, because the mean of its divisors is an integer number (14663880).

Almost surely, 2^231913326 is an apocalyptic number.

231913326 is an abundant number, since it is smaller than the sum of its proper divisors (237330834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231913326 is a wasteful number, since it uses less digits than its factorization.

231913326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368.

The product of its digits is 5832, while the sum is 30.

The square root of 231913326 is about 15228.7007324985. The cubic root of 231913326 is about 614.3868354944.

The spelling of 231913326 in words is "two hundred thirty-one million, nine hundred thirteen thousand, three hundred twenty-six".