231959856357620 has 12 divisors (see below), whose sum is σ = 487115698351044. Its totient is φ = 92783942543040.

The previous prime is 231959856357599. The next prime is 231959856357637. The reversal of 231959856357620 is 26753658959132.

It can be written as a sum of positive squares in 2 ways, for example, as 132341371776784 + 99618484580836 = 11503972^2 + 9980906^2 .

It is a super-2 number, since 2×231959856357620² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5798996408921 + ... + 5798996408960.

It is an arithmetic number, because the mean of its divisors is an integer number (40592974862587).

Almost surely, 2^{231959856357620} is an apocalyptic number.

231959856357620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231959856357620 is an abundant number, since it is smaller than the sum of its proper divisors (255155841993424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231959856357620 is a wasteful number, since it uses less digits than its factorization.

231959856357620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11597992817890 (or 11597992817888 counting only the distinct ones).

The product of its (nonzero) digits is 734832000, while the sum is 71.

The spelling of 231959856357620 in words is "two hundred thirty-one trillion, nine hundred fifty-nine billion, eight hundred fifty-six million, three hundred fifty-seven thousand, six hundred twenty".