52407581 has 2 divisors, whose sum is σ = 52407582. Its totient is φ = 52407580.

The previous prime is 52407571. The next prime is 52407599. The reversal of 52407581 is 18570425.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49632025 + 2775556 = 7045^2 + 1666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52407581 is a prime.

It is a super-2 number, since 2×52407581² = 5493109092543122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52407521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26203790 + 26203791.

It is an arithmetic number, because the mean of its divisors is an integer number (26203791).

Almost surely, 2^52407581 is an apocalyptic number.

It is an amenable number.

52407581 is a deficient number, since it is larger than the sum of its proper divisors (1).

52407581 is an equidigital number, since it uses as much as digits as its factorization.

52407581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 52407581 is about 7239.3080470443. The cubic root of 52407581 is about 374.2237715455.

It can be divided in two parts, 5240 and 7581, that added together give a palindrome (12821).

The spelling of 52407581 in words is "fifty-two million, four hundred seven thousand, five hundred eighty-one".