2131398368 has 24 divisors (see below), whose sum is σ = 4577663160. Its totient is φ = 968817280.

The previous prime is 2131398361. The next prime is 2131398389. The reversal of 2131398368 is 8638931312.

It is a super-2 number, since 2×2131398368² = 9085718006226126848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131398361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3027203 + ... + 3027906.

It is an arithmetic number, because the mean of its divisors is an integer number (190735965).

Almost surely, 2^2131398368 is an apocalyptic number.

It is an amenable number.

2131398368 is an abundant number, since it is smaller than the sum of its proper divisors (2446264792).

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

2131398368 is a wasteful number, since it uses less digits than its factorization.

2131398368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6055130 (or 6055122 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 2131398368 is about 46167.0701691151. The cubic root of 2131398368 is about 1286.9298558078.

The spelling of 2131398368 in words is "two billion, one hundred thirty-one million, three hundred ninety-eight thousand, three hundred sixty-eight".