2151268957 has 2 divisors, whose sum is σ = 2151268958. Its totient is φ = 2151268956.

The previous prime is 2151268891. The next prime is 2151268991. The reversal of 2151268957 is 7598621512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1343515716 + 807753241 = 36654^2 + 28421^2 .

It is a cyclic number.

It is not a de Polignac number, because 2151268957 - 2¹⁵ = 2151236189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2151268997) 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 as a sum of consecutive naturals, namely, 1075634478 + 1075634479.

It is an arithmetic number, because the mean of its divisors is an integer number (1075634479).

Almost surely, 2^2151268957 is an apocalyptic number.

It is an amenable number.

2151268957 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151268957 is an equidigital number, since it uses as much as digits as its factorization.

2151268957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 46.

The square root of 2151268957 is about 46381.7739742671. The cubic root of 2151268957 is about 1290.9167525480.

The spelling of 2151268957 in words is "two billion, one hundred fifty-one million, two hundred sixty-eight thousand, nine hundred fifty-seven".