231235402 has 4 divisors (see below), whose sum is σ = 346853106. Its totient is φ = 115617700.

The previous prime is 231235393. The next prime is 231235421. The reversal of 231235402 is 204532132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 230462761 + 772641 = 15181^2 + 879^2 .

It is a super-2 number, since 2×231235402² = 106939622276203208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57808849 + ... + 57808852.

Almost surely, 2^231235402 is an apocalyptic number.

231235402 is a deficient number, since it is larger than the sum of its proper divisors (115617704).

231235402 is a wasteful number, since it uses less digits than its factorization.

231235402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115617703.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 231235402 is about 15206.4263388871. The cubic root of 231235402 is about 613.7875971344.

Adding to 231235402 its reverse (204532132), we get a palindrome (435767534).

The spelling of 231235402 in words is "two hundred thirty-one million, two hundred thirty-five thousand, four hundred two".