53669581 has 16 divisors (see below), whose sum is σ = 62449920. Its totient is φ = 45175680.

The previous prime is 53669537. The next prime is 53669593. The reversal of 53669581 is 18596635.

It is a cyclic number.

It is not a de Polignac number, because 53669581 - 2⁹ = 53669069 is a prime.

It is a super-2 number, since 2×53669581² = 5760847849431122, 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 (53669531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172416 + ... + 172726.

It is an arithmetic number, because the mean of its divisors is an integer number (3903120).

Almost surely, 2^53669581 is an apocalyptic number.

It is an amenable number.

53669581 is a deficient number, since it is larger than the sum of its proper divisors (8780339).

53669581 is a wasteful number, since it uses less digits than its factorization.

53669581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684.

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

The square root of 53669581 is about 7325.9525660490. The cubic root of 53669581 is about 377.2038078376.

The spelling of 53669581 in words is "fifty-three million, six hundred sixty-nine thousand, five hundred eighty-one".