2154336957 has 6 divisors (see below), whose sum is σ = 3111820062. Its totient is φ = 1436224632.

The previous prime is 2154336871. The next prime is 2154336967. The reversal of 2154336957 is 7596334512.

2154336957 is a `hidden beast` number, since 21 + 543 + 36 + 9 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1990855161 + 163481796 = 44619^2 + 12786^2 .

It is not a de Polignac number, because 2154336957 - 2⁷ = 2154336829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154336967) 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 5 ways as a sum of consecutive naturals, for example, 119685378 + ... + 119685395.

It is an arithmetic number, because the mean of its divisors is an integer number (518636677).

Almost surely, 2^2154336957 is an apocalyptic number.

It is an amenable number.

2154336957 is a deficient number, since it is larger than the sum of its proper divisors (957483105).

2154336957 is a wasteful number, since it uses less digits than its factorization.

2154336957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239370779 (or 239370776 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 2154336957 is about 46414.8355270166. The cubic root of 2154336957 is about 1291.5301349151.

The spelling of 2154336957 in words is "two billion, one hundred fifty-four million, three hundred thirty-six thousand, nine hundred fifty-seven".