231032091 has 24 divisors (see below), whose sum is σ = 328514560. Its totient is φ = 144392832.

The previous prime is 231032069. The next prime is 231032093. The reversal of 231032091 is 190230132.

It is a happy number.

231032091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231032091 - 2¹¹ = 231030043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231032093) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 380310 + ... + 380916.

Almost surely, 2^231032091 is an apocalyptic number.

231032091 is a deficient number, since it is larger than the sum of its proper divisors (97482469).

231032091 is a wasteful number, since it uses less digits than its factorization.

231032091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 231032091 is about 15199.7398332998. The cubic root of 231032091 is about 613.6076558851.

The spelling of 231032091 in words is "two hundred thirty-one million, thirty-two thousand, ninety-one".