231250045400 has 144 divisors (see below), whose sum is σ = 616673811600. Its totient is φ = 80434604800.

The previous prime is 231250045391. The next prime is 231250045421. The reversal of 231250045400 is 4540052132.

It is a happy number.

It is a super-2 number, since 2×231250045400² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231250045400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 348866 + ... + 764334.

It is an arithmetic number, because the mean of its divisors is an integer number (4282457025).

Almost surely, 2^231250045400 is an apocalyptic number.

231250045400 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 231250045400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308336905800).

231250045400 is an abundant number, since it is smaller than the sum of its proper divisors (385423766200).

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

231250045400 is a wasteful number, since it uses less digits than its factorization.

231250045400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415530 (or 415510 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 231250045400 its reverse (4540052132), we get a palindrome (235790097532).

The spelling of 231250045400 in words is "two hundred thirty-one billion, two hundred fifty million, forty-five thousand, four hundred".