52505491 has 2 divisors, whose sum is σ = 52505492. Its totient is φ = 52505490.

The previous prime is 52505489. The next prime is 52505501. The reversal of 52505491 is 19450525.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 52505491 - 2¹ = 52505489 is a prime.

Together with 52505489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (52505471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26252745 + 26252746.

It is an arithmetic number, because the mean of its divisors is an integer number (26252746).

Almost surely, 2^52505491 is an apocalyptic number.

52505491 is a deficient number, since it is larger than the sum of its proper divisors (1).

52505491 is an equidigital number, since it uses as much as digits as its factorization.

52505491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 52505491 is about 7246.0672781861. The cubic root of 52505491 is about 374.4566733180.

The spelling of 52505491 in words is "fifty-two million, five hundred five thousand, four hundred ninety-one".