52131531 has 8 divisors (see below), whose sum is σ = 71905680. Its totient is φ = 33555872.

The previous prime is 52131517. The next prime is 52131551. The reversal of 52131531 is 13513125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52131531 - 2⁹ = 52131019 is a prime.

It is a super-2 number, since 2×52131531² = 5435393048807922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 52131498 and 52131507.

It is not an unprimeable number, because it can be changed into a prime (52131551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299520 + ... + 299693.

It is an arithmetic number, because the mean of its divisors is an integer number (8988210).

Almost surely, 2^52131531 is an apocalyptic number.

52131531 is a deficient number, since it is larger than the sum of its proper divisors (19774149).

52131531 is a wasteful number, since it uses less digits than its factorization.

52131531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599245.

The product of its digits is 450, while the sum is 21.

The square root of 52131531 is about 7220.2168249991. The cubic root of 52131531 is about 373.5655564318.

Adding to 52131531 its reverse (13513125), we get a palindrome (65644656).

The spelling of 52131531 in words is "fifty-two million, one hundred thirty-one thousand, five hundred thirty-one".