52691531 has 2 divisors, whose sum is σ = 52691532. Its totient is φ = 52691530.

The previous prime is 52691491. The next prime is 52691533. The reversal of 52691531 is 13519625.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 52691531 - 2¹⁸ = 52429387 is a prime.

It is a super-2 number, since 2×52691531² = 5552794878247922, which contains 22 as substring.

Together with 52691533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (52691533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26345765 + 26345766.

It is an arithmetic number, because the mean of its divisors is an integer number (26345766).

Almost surely, 2^52691531 is an apocalyptic number.

52691531 is a deficient number, since it is larger than the sum of its proper divisors (1).

52691531 is an equidigital number, since it uses as much as digits as its factorization.

52691531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 32.

The square root of 52691531 is about 7258.8932351978. The cubic root of 52691531 is about 374.8984163364.

The spelling of 52691531 in words is "fifty-two million, six hundred ninety-one thousand, five hundred thirty-one".