53531915 has 4 divisors (see below), whose sum is σ = 64238304. Its totient is φ = 42825528.

The previous prime is 53531893. The next prime is 53531957. The reversal of 53531915 is 51913535.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 53531915 - 2⁸ = 53531659 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5353187 + ... + 5353196.

It is an arithmetic number, because the mean of its divisors is an integer number (16059576).

Almost surely, 2^53531915 is an apocalyptic number.

53531915 is a deficient number, since it is larger than the sum of its proper divisors (10706389).

53531915 is a wasteful number, since it uses less digits than its factorization.

53531915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10706388.

The product of its digits is 10125, while the sum is 32.

The square root of 53531915 is about 7316.5507583834. The cubic root of 53531915 is about 376.8810141712.

The spelling of 53531915 in words is "fifty-three million, five hundred thirty-one thousand, nine hundred fifteen".