53525681 has 12 divisors (see below), whose sum is σ = 59197236. Its totient is φ = 48359520.

The previous prime is 53525653. The next prime is 53525699. The reversal of 53525681 is 18652535.

53525681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 37405456 + 16120225 = 6116^2 + 4015^2 .

It is not a de Polignac number, because 53525681 - 2⁶ = 53525617 is a prime.

It is a super-2 number, since 2×53525681² = 5729997053027522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53525611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19655 + ... + 22211.

It is an arithmetic number, because the mean of its divisors is an integer number (4933103).

Almost surely, 2^53525681 is an apocalyptic number.

It is an amenable number.

53525681 is a deficient number, since it is larger than the sum of its proper divisors (5671555).

53525681 is a wasteful number, since it uses less digits than its factorization.

53525681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752 (or 2741 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The square root of 53525681 is about 7316.1247255634. The cubic root of 53525681 is about 376.8663838493.

The spelling of 53525681 in words is "fifty-three million, five hundred twenty-five thousand, six hundred eighty-one".