231320202030 has 64 divisors (see below), whose sum is σ = 622961409600. Its totient is φ = 61074633600.

The previous prime is 231320202013. The next prime is 231320202041. The reversal of 231320202030 is 30202023132.

It is a happy number.

It is a super-2 number, since 2×231320202030² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231320201994 and 231320202012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4214025 + ... + 4268564.

It is an arithmetic number, because the mean of its divisors is an integer number (9733772025).

Almost surely, 2^231320202030 is an apocalyptic number.

231320202030 is an abundant number, since it is smaller than the sum of its proper divisors (391641207570).

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

231320202030 is a wasteful number, since it uses less digits than its factorization.

231320202030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8482706 (or 8482700 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 231320202030 its reverse (30202023132), we get a palindrome (261522225162).

The spelling of 231320202030 in words is "two hundred thirty-one billion, three hundred twenty million, two hundred two thousand, thirty".