231531423455130 has 128 divisors (see below), whose sum is σ = 569848661803008. Its totient is φ = 60186266376192.

The previous prime is 231531423455119. The next prime is 231531423455131. The reversal of 231531423455130 is 31554324135132.

It is not an unprimeable number, because it can be changed into a prime (231531423455131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1821541159 + ... + 1821668261.

It is an arithmetic number, because the mean of its divisors is an integer number (4451942670336).

Almost surely, 2^{231531423455130} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231531423455130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284924330901504).

231531423455130 is an abundant number, since it is smaller than the sum of its proper divisors (338317238347878).

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

231531423455130 is a wasteful number, since it uses less digits than its factorization.

231531423455130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136620.

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 231531423455130 in words is "two hundred thirty-one trillion, five hundred thirty-one billion, four hundred twenty-three million, four hundred fifty-five thousand, one hundred thirty".