231621325642238 has 16 divisors (see below), whose sum is σ = 397148041695840. Its totient is φ = 99245554412256.

The previous prime is 231621325642171. The next prime is 231621325642277. The reversal of 231621325642238 is 832246523126132.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1727264381 + ... + 1727398472.

It is an arithmetic number, because the mean of its divisors is an integer number (24821752605990).

Almost surely, 2^{231621325642238} is an apocalyptic number.

231621325642238 is a deficient number, since it is larger than the sum of its proper divisors (165526716053602).

231621325642238 is a wasteful number, since it uses less digits than its factorization.

231621325642238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3454667651.

The product of its digits is 4976640, while the sum is 50.

The spelling of 231621325642238 in words is "two hundred thirty-one trillion, six hundred twenty-one billion, three hundred twenty-five million, six hundred forty-two thousand, two hundred thirty-eight".