53037561 has 4 divisors (see below), whose sum is σ = 70716752. Its totient is φ = 35358372.

The previous prime is 53037553. The next prime is 53037599. The reversal of 53037561 is 16573035.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 53037561 - 2³ = 53037553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53037511) 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, 8839591 + ... + 8839596.

It is an arithmetic number, because the mean of its divisors is an integer number (17679188).

Almost surely, 2^53037561 is an apocalyptic number.

It is an amenable number.

53037561 is a deficient number, since it is larger than the sum of its proper divisors (17679191).

53037561 is a wasteful number, since it uses less digits than its factorization.

53037561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17679190.

The product of its (nonzero) digits is 9450, while the sum is 30.

The square root of 53037561 is about 7282.6891324565. The cubic root of 53037561 is about 375.7172902223.

The spelling of 53037561 in words is "fifty-three million, thirty-seven thousand, five hundred sixty-one".