231393135290 has 8 divisors (see below), whose sum is σ = 416507643540. Its totient is φ = 92557254112.

The previous prime is 231393135221. The next prime is 231393135319. The reversal of 231393135290 is 92531393132.

It can be written as a sum of positive squares in 2 ways, for example, as 205958945929 + 25434189361 = 453827^2 + 159481^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11569656755 + ... + 11569656774.

Almost surely, 2^231393135290 is an apocalyptic number.

231393135290 is a deficient number, since it is larger than the sum of its proper divisors (185114508250).

231393135290 is a wasteful number, since it uses less digits than its factorization.

231393135290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23139313536.

The product of its (nonzero) digits is 131220, while the sum is 41.

The spelling of 231393135290 in words is "two hundred thirty-one billion, three hundred ninety-three million, one hundred thirty-five thousand, two hundred ninety".