231520002221352 has 256 divisors, whose sum is σ = 672232133664000. Its totient is φ = 65831834419200.

The previous prime is 231520002221317. The next prime is 231520002221383. The reversal of 231520002221352 is 253122200025132.

It is a happy number.

231520002221352 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231520002221352² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1730677924 + ... + 1730811692.

It is an arithmetic number, because the mean of its divisors is an integer number (2625906772125).

Almost surely, 2^{231520002221352} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231520002221352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336116066832000).

231520002221352 is an abundant number, since it is smaller than the sum of its proper divisors (440712131442648).

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

231520002221352 is a wasteful number, since it uses less digits than its factorization.

231520002221352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140972 (or 140968 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 231520002221352 its reverse (253122200025132), we get a palindrome (484642202246484).

The spelling of 231520002221352 in words is "two hundred thirty-one trillion, five hundred twenty billion, two million, two hundred twenty-one thousand, three hundred fifty-two".