231622138 has 16 divisors (see below), whose sum is σ = 384212736. Its totient is φ = 103839840.

The previous prime is 231622099. The next prime is 231622163. The reversal of 231622138 is 831226132.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70506 + ... + 73717.

It is an arithmetic number, because the mean of its divisors is an integer number (24013296).

Almost surely, 2^231622138 is an apocalyptic number.

231622138 is a deficient number, since it is larger than the sum of its proper divisors (152590598).

231622138 is a wasteful number, since it uses less digits than its factorization.

231622138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144309.

The product of its digits is 3456, while the sum is 28.

The square root of 231622138 is about 15219.1372291599. The cubic root of 231622138 is about 614.1295885233.

The spelling of 231622138 in words is "two hundred thirty-one million, six hundred twenty-two thousand, one hundred thirty-eight".