2131537968 has 60 divisors (see below), whose sum is σ = 6817541328. Its totient is φ = 609010560.

The previous prime is 2131537963. The next prime is 2131537987. The reversal of 2131537968 is 8697351312.

2131537968 is a `hidden beast` number, since 21 + 3 + 1 + 537 + 96 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (2131537963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1056303 + ... + 1058318.

Almost surely, 2^2131537968 is an apocalyptic number.

2131537968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2131537968 is an abundant number, since it is smaller than the sum of its proper divisors (4686003360).

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

2131537968 is a wasteful number, since it uses less digits than its factorization.

2131537968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114642 (or 2114633 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 2131537968 is about 46168.5820445029. The cubic root of 2131537968 is about 1286.9579518359.

The spelling of 2131537968 in words is "two billion, one hundred thirty-one million, five hundred thirty-seven thousand, nine hundred sixty-eight".