231324638 has 4 divisors (see below), whose sum is σ = 346986960. Its totient is φ = 115662318.

The previous prime is 231324607. The next prime is 231324641. The reversal of 231324638 is 836423132.

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

It is a super-2 number, since 2×231324638² = 107022176291662088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57831158 + ... + 57831161.

It is an arithmetic number, because the mean of its divisors is an integer number (86746740).

Almost surely, 2^231324638 is an apocalyptic number.

231324638 is a deficient number, since it is larger than the sum of its proper divisors (115662322).

231324638 is a wasteful number, since it uses less digits than its factorization.

231324638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115662321.

The product of its digits is 20736, while the sum is 32.

The square root of 231324638 is about 15209.3602100812. The cubic root of 231324638 is about 613.8665425227.

The spelling of 231324638 in words is "two hundred thirty-one million, three hundred twenty-four thousand, six hundred thirty-eight".