2131400320 has 64 divisors (see below), whose sum is σ = 5823302400. Its totient is φ = 730764288.

The previous prime is 2131400251. The next prime is 2131400339. The reversal of 2131400320 is 230041312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×2131400320² = 9085734648192204800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 2131400294 and 2131400303.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233400 + ... + 242359.

It is an arithmetic number, because the mean of its divisors is an integer number (90989100).

Almost surely, 2^2131400320 is an apocalyptic number.

2131400320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131400320 is an abundant number, since it is smaller than the sum of its proper divisors (3691902080).

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

2131400320 is an equidigital number, since it uses as much as digits as its factorization.

2131400320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475785 (or 475773 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2131400320 is about 46167.0913097197. The cubic root of 2131400320 is about 1286.9302486776.

Adding to 2131400320 its reverse (230041312), we get a palindrome (2361441632).

The spelling of 2131400320 in words is "two billion, one hundred thirty-one million, four hundred thousand, three hundred twenty".