52151931 has 28 divisors (see below), whose sum is σ = 84222208. Its totient is φ = 32087664.

The previous prime is 52151923. The next prime is 52151933. The reversal of 52151931 is 13915125.

52151931 is a `hidden beast` number, since 521 + 51 + 93 + 1 = 666.

It is not a de Polignac number, because 52151931 - 2³ = 52151923 is a prime.

It is a super-2 number, since 2×52151931² = 5439647814057522, which contains 22 as substring.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52151895 and 52151904.

It is not an unprimeable number, because it can be changed into a prime (52151933) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 6726 + ... + 12228.

It is an arithmetic number, because the mean of its divisors is an integer number (3007936).

Almost surely, 2^52151931 is an apocalyptic number.

52151931 is a deficient number, since it is larger than the sum of its proper divisors (32070277).

52151931 is an equidigital number, since it uses as much as digits as its factorization.

52151931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5534 (or 5519 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

The square root of 52151931 is about 7221.6293867797. The cubic root of 52151931 is about 373.6142777039.

The spelling of 52151931 in words is "fifty-two million, one hundred fifty-one thousand, nine hundred thirty-one".