53137661 has 16 divisors (see below), whose sum is σ = 57984960. Its totient is φ = 48522240.

The previous prime is 53137639. The next prime is 53137687. The reversal of 53137661 is 16673135.

It is a cyclic number.

It is not a de Polignac number, because 53137661 - 2¹⁰ = 53136637 is a prime.

It is a super-2 number, since 2×53137661² = 5647222033101842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53137621) 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, 91805 + ... + 92381.

It is an arithmetic number, because the mean of its divisors is an integer number (3624060).

Almost surely, 2^53137661 is an apocalyptic number.

It is an amenable number.

53137661 is a deficient number, since it is larger than the sum of its proper divisors (4847299).

53137661 is a wasteful number, since it uses less digits than its factorization.

53137661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764.

The product of its digits is 11340, while the sum is 32.

The square root of 53137661 is about 7289.5583542489. The cubic root of 53137661 is about 375.9535106435.

The spelling of 53137661 in words is "fifty-three million, one hundred thirty-seven thousand, six hundred sixty-one".