53251555 has 32 divisors (see below), whose sum is σ = 77220864. Its totient is φ = 34463616.

The previous prime is 53251519. The next prime is 53251567. The reversal of 53251555 is 55515235.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 53251555 - 2⁷ = 53251427 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66417 + ... + 67213.

It is an arithmetic number, because the mean of its divisors is an integer number (2413152).

Almost surely, 2^53251555 is an apocalyptic number.

53251555 is a deficient number, since it is larger than the sum of its proper divisors (23969309).

53251555 is a wasteful number, since it uses less digits than its factorization.

53251555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915.

The product of its digits is 18750, while the sum is 31.

The square root of 53251555 is about 7297.3663057298. The cubic root of 53251555 is about 376.2219222396.

The spelling of 53251555 in words is "fifty-three million, two hundred fifty-one thousand, five hundred fifty-five".