53561515 has 8 divisors (see below), whose sum is σ = 73455840. Its totient is φ = 36727872.

The previous prime is 53561507. The next prime is 53561567. The reversal of 53561515 is 51516535.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53561515 - 2³ = 53561507 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 765130 + ... + 765199.

It is an arithmetic number, because the mean of its divisors is an integer number (9181980).

Almost surely, 2^53561515 is an apocalyptic number.

53561515 is a deficient number, since it is larger than the sum of its proper divisors (19894325).

53561515 is a wasteful number, since it uses less digits than its factorization.

53561515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530341.

The product of its digits is 11250, while the sum is 31.

The square root of 53561515 is about 7318.5732899248. The cubic root of 53561515 is about 376.9504657155.

The spelling of 53561515 in words is "fifty-three million, five hundred sixty-one thousand, five hundred fifteen".