231220320232200 has 384 divisors, whose sum is σ = 808476416697600. Its totient is φ = 54238777528320.

The previous prime is 231220320232151. The next prime is 231220320232259. The reversal of 231220320232200 is 2232023022132.

It is a super-2 number, since 2×231220320232200² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 45862962 + ... + 50654238.

It is an arithmetic number, because the mean of its divisors is an integer number (2105407335150).

Almost surely, 2^{231220320232200} is an apocalyptic number.

231220320232200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231220320232200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404238208348800).

231220320232200 is an abundant number, since it is smaller than the sum of its proper divisors (577256096465400).

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

231220320232200 is a wasteful number, since it uses less digits than its factorization.

231220320232200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4791601 (or 4791592 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 231220320232200 its reverse (2232023022132), we get a palindrome (233452343254332).

The spelling of 231220320232200 in words is "two hundred thirty-one trillion, two hundred twenty billion, three hundred twenty million, two hundred thirty-two thousand, two hundred".