53561507 has 2 divisors, whose sum is σ = 53561508. Its totient is φ = 53561506.

The previous prime is 53561471. The next prime is 53561567. The reversal of 53561507 is 70516535.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53561507 - 2⁸ = 53561251 is a prime.

It is a super-2 number, since 2×53561507² = 5737670064222098, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53561567) 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 as a sum of consecutive naturals, namely, 26780753 + 26780754.

It is an arithmetic number, because the mean of its divisors is an integer number (26780754).

Almost surely, 2^53561507 is an apocalyptic number.

53561507 is a deficient number, since it is larger than the sum of its proper divisors (1).

53561507 is an equidigital number, since it uses as much as digits as its factorization.

53561507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 53561507 is about 7318.5727433701. The cubic root of 53561507 is about 376.9504469483.

The spelling of 53561507 in words is "fifty-three million, five hundred sixty-one thousand, five hundred seven".