53696581 has 4 divisors (see below), whose sum is σ = 54250252. Its totient is φ = 53142912.

The previous prime is 53696567. The next prime is 53696597. The reversal of 53696581 is 18569635.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38750625 + 14945956 = 6225^2 + 3866^2 .

It is a cyclic number.

It is not a de Polignac number, because 53696581 - 2⁷ = 53696453 is a prime.

It is a super-2 number, since 2×53696581² = 5766645622179122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53696501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276690 + ... + 276883.

It is an arithmetic number, because the mean of its divisors is an integer number (13562563).

Almost surely, 2^53696581 is an apocalyptic number.

It is an amenable number.

53696581 is a deficient number, since it is larger than the sum of its proper divisors (553671).

53696581 is an equidigital number, since it uses as much as digits as its factorization.

53696581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553670.

The product of its digits is 194400, while the sum is 43.

The square root of 53696581 is about 7327.7950981179. The cubic root of 53696581 is about 377.2670515798.

The spelling of 53696581 in words is "fifty-three million, six hundred ninety-six thousand, five hundred eighty-one".