53155513 has 4 divisors (see below), whose sum is σ = 53278708. Its totient is φ = 53032320.

The previous prime is 53155471. The next prime is 53155523. The reversal of 53155513 is 31555135.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8573184 + 44582329 = 2928^2 + 6677^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53155513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53155523) 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, 60948 + ... + 61813.

It is an arithmetic number, because the mean of its divisors is an integer number (13319677).

Almost surely, 2^53155513 is an apocalyptic number.

It is an amenable number.

53155513 is a deficient number, since it is larger than the sum of its proper divisors (123195).

53155513 is a wasteful number, since it uses less digits than its factorization.

53155513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123194.

The product of its digits is 5625, while the sum is 28.

The square root of 53155513 is about 7290.7827426141. The cubic root of 53155513 is about 375.9956074068.

The spelling of 53155513 in words is "fifty-three million, one hundred fifty-five thousand, five hundred thirteen".