53361581 has 24 divisors (see below), whose sum is σ = 67636800. Its totient is φ = 41198976.

The previous prime is 53361559. The next prime is 53361593. The reversal of 53361581 is 18516335.

It is a de Polignac number, because none of the positive numbers 2^k-53361581 is a prime.

It is a super-2 number, since 2×53361581² = 5694916653639122, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53361551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50345 + ... + 51393.

It is an arithmetic number, because the mean of its divisors is an integer number (2818200).

Almost surely, 2^53361581 is an apocalyptic number.

It is an amenable number.

53361581 is a deficient number, since it is larger than the sum of its proper divisors (14275219).

53361581 is a wasteful number, since it uses less digits than its factorization.

53361581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125 (or 1112 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 53361581 is about 7304.9011629179. The cubic root of 53361581 is about 376.4808550035.

The spelling of 53361581 in words is "fifty-three million, three hundred sixty-one thousand, five hundred eighty-one".