231551351335544 has 8 divisors (see below), whose sum is σ = 434158783754160. Its totient is φ = 115775675667768.

The previous prime is 231551351335531. The next prime is 231551351335583. The reversal of 231551351335544 is 445533153155132.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 231551351335492 and 231551351335501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14471959458464 + ... + 14471959458479.

It is an arithmetic number, because the mean of its divisors is an integer number (54269847969270).

Almost surely, 2^{231551351335544} is an apocalyptic number.

It is an amenable number.

231551351335544 is a deficient number, since it is larger than the sum of its proper divisors (202607432418616).

231551351335544 is a wasteful number, since it uses less digits than its factorization.

231551351335544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28943918916949 (or 28943918916945 counting only the distinct ones).

The product of its digits is 8100000, while the sum is 50.

The spelling of 231551351335544 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, three hundred fifty-one million, three hundred thirty-five thousand, five hundred forty-four".