2135197956 has 12 divisors (see below), whose sum is σ = 4982128592. Its totient is φ = 711732648.

The previous prime is 2135197949. The next prime is 2135197957. The reversal of 2135197956 is 6597915312.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×2135197956² = 9118140622613155872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2135197957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88966570 + ... + 88966593.

Almost surely, 2^2135197956 is an apocalyptic number.

It is an amenable number.

2135197956 is an abundant number, since it is smaller than the sum of its proper divisors (2846930636).

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

2135197956 is a wasteful number, since it uses less digits than its factorization.

2135197956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177933170 (or 177933168 counting only the distinct ones).

The product of its digits is 510300, while the sum is 48.

The square root of 2135197956 is about 46208.2022589064. The cubic root of 2135197956 is about 1287.6941272118.

The spelling of 2135197956 in words is "two billion, one hundred thirty-five million, one hundred ninety-seven thousand, nine hundred fifty-six".