231321441655620 has 48 divisors (see below), whose sum is σ = 719666707374720. Its totient is φ = 61685717774688.

The previous prime is 231321441655573. The next prime is 231321441655669. The reversal of 231321441655620 is 26556144123132.

231321441655620 is a `hidden beast` number, since 2 + 3 + 1 + 3 + 2 + 1 + 4 + 4 + 16 + 5 + 5 + 620 = 666.

231321441655620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214186519512 + ... + 214186520591.

It is an arithmetic number, because the mean of its divisors is an integer number (14993056403640).

Almost surely, 2^{231321441655620} is an apocalyptic number.

231321441655620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231321441655620 is an abundant number, since it is smaller than the sum of its proper divisors (488345265719100).

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

231321441655620 is a wasteful number, since it uses less digits than its factorization.

231321441655620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428373040121 (or 428373040113 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

Adding to 231321441655620 its reverse (26556144123132), we get a palindrome (257877585778752).

The spelling of 231321441655620 in words is "two hundred thirty-one trillion, three hundred twenty-one billion, four hundred forty-one million, six hundred fifty-five thousand, six hundred twenty".