53149520 has 20 divisors (see below), whose sum is σ = 123572820. Its totient is φ = 21259776.

The previous prime is 53149519. The next prime is 53149529. The reversal of 53149520 is 2594135.

It can be written as a sum of positive squares in 2 ways, for example, as 41886784 + 11262736 = 6472^2 + 3356^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53149529) 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, 332105 + ... + 332264.

It is an arithmetic number, because the mean of its divisors is an integer number (6178641).

Almost surely, 2^53149520 is an apocalyptic number.

It is an amenable number.

53149520 is an abundant number, since it is smaller than the sum of its proper divisors (70423300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53149520 is a wasteful number, since it uses less digits than its factorization.

53149520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664382 (or 664376 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 53149520 is about 7290.3717326348. The cubic root of 53149520 is about 375.9814763773.

The spelling of 53149520 in words is "fifty-three million, one hundred forty-nine thousand, five hundred twenty".