53311765 has 16 divisors (see below), whose sum is σ = 69174000. Its totient is φ = 39209472.

The previous prime is 53311759. The next prime is 53311781. The reversal of 53311765 is 56711335.

It can be written as a sum of positive squares in 8 ways, for example, as 25020004 + 28291761 = 5002^2 + 5319^2 .

It is a cyclic number.

It is not a de Polignac number, because 53311765 - 2³ = 53311757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15961 + ... + 19009.

It is an arithmetic number, because the mean of its divisors is an integer number (4323375).

Almost surely, 2^53311765 is an apocalyptic number.

It is an amenable number.

53311765 is a deficient number, since it is larger than the sum of its proper divisors (15862235).

53311765 is a wasteful number, since it uses less digits than its factorization.

53311765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336.

The product of its digits is 9450, while the sum is 31.

The square root of 53311765 is about 7301.4906012403. The cubic root of 53311765 is about 376.3636632639.

The spelling of 53311765 in words is "fifty-three million, three hundred eleven thousand, seven hundred sixty-five".