52531531 has 4 divisors (see below), whose sum is σ = 56572432. Its totient is φ = 48490632.

The previous prime is 52531511. The next prime is 52531559. The reversal of 52531531 is 13513525.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52531531 - 2⁷ = 52531403 is a prime.

It is a super-2 number, since 2×52531531² = 5519123498407922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52531496 and 52531505.

It is not an unprimeable number, because it can be changed into a prime (52531511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2020431 + ... + 2020456.

It is an arithmetic number, because the mean of its divisors is an integer number (14143108).

Almost surely, 2^52531531 is an apocalyptic number.

52531531 is a deficient number, since it is larger than the sum of its proper divisors (4040901).

52531531 is a wasteful number, since it uses less digits than its factorization.

52531531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040900.

The product of its digits is 2250, while the sum is 25.

The square root of 52531531 is about 7247.8638922099. The cubic root of 52531531 is about 374.5185667826.

The spelling of 52531531 in words is "fifty-two million, five hundred thirty-one thousand, five hundred thirty-one".