2131023031400 has 96 divisors (see below), whose sum is σ = 4994891244000. Its totient is φ = 845506379520.

The previous prime is 2131023031369. The next prime is 2131023031421. The reversal of 2131023031400 is 41303201312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14137631 + ... + 14287569.

It is an arithmetic number, because the mean of its divisors is an integer number (52030117125).

Almost surely, 2^{2131023031400} is an apocalyptic number.

2131023031400 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 2131023031400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2497445622000).

2131023031400 is an abundant number, since it is smaller than the sum of its proper divisors (2863868212600).

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

2131023031400 is a wasteful number, since it uses less digits than its factorization.

2131023031400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150531 (or 150522 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 2131023031400 its reverse (41303201312), we get a palindrome (2172326232712).

The spelling of 2131023031400 in words is "two trillion, one hundred thirty-one billion, twenty-three million, thirty-one thousand, four hundred".