52157961 has 6 divisors (see below), whose sum is σ = 75339290. Its totient is φ = 34771968.

The previous prime is 52157957. The next prime is 52157969. The reversal of 52157961 is 16975125.

52157961 is a `hidden beast` number, since 5 + 21 + 579 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 39690000 + 12467961 = 6300^2 + 3531^2 .

It is not a de Polignac number, because 52157961 - 2² = 52157957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52157969) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2897656 + ... + 2897673.

Almost surely, 2^52157961 is an apocalyptic number.

It is an amenable number.

52157961 is a deficient number, since it is larger than the sum of its proper divisors (23181329).

52157961 is a wasteful number, since it uses less digits than its factorization.

52157961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5795335 (or 5795332 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 52157961 is about 7222.0468705208. The cubic root of 52157961 is about 373.6286767059.

The spelling of 52157961 in words is "fifty-two million, one hundred fifty-seven thousand, nine hundred sixty-one".