52331913 has 10 divisors (see below), whose sum is σ = 78174954. Its totient is φ = 34887888.

The previous prime is 52331869. The next prime is 52331957. The reversal of 52331913 is 31913325.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (52331869) and next prime (52331957).

It can be written as a sum of positive squares in only one way, i.e., 41062464 + 11269449 = 6408^2 + 3357^2 .

It is not a de Polignac number, because 52331913 - 2¹³ = 52323721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52331963) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 322956 + ... + 323117.

Almost surely, 2^52331913 is an apocalyptic number.

It is an amenable number.

52331913 is a deficient number, since it is larger than the sum of its proper divisors (25843041).

52331913 is an equidigital number, since it uses as much as digits as its factorization.

52331913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646085 (or 646076 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 52331913 is about 7234.0799691460. The cubic root of 52331913 is about 374.0435787629.

The spelling of 52331913 in words is "fifty-two million, three hundred thirty-one thousand, nine hundred thirteen".