53415865 has 8 divisors (see below), whose sum is σ = 64172808. Its totient is φ = 42683520.

The previous prime is 53415841. The next prime is 53415871. The reversal of 53415865 is 56851435.

It can be written as a sum of positive squares in 4 ways, for example, as 3671056 + 49744809 = 1916^2 + 7053^2 .

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

It is not a de Polignac number, because 53415865 - 2⁵ = 53415833 is a prime.

It is a Duffinian number.

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, 972 + ... + 10381.

It is an arithmetic number, because the mean of its divisors is an integer number (8021601).

Almost surely, 2^53415865 is an apocalyptic number.

It is an amenable number.

53415865 is a deficient number, since it is larger than the sum of its proper divisors (10756943).

53415865 is a wasteful number, since it uses less digits than its factorization.

53415865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12299.

The product of its digits is 72000, while the sum is 37.

The square root of 53415865 is about 7308.6158060196. The cubic root of 53415865 is about 376.6084746643.

The spelling of 53415865 in words is "fifty-three million, four hundred fifteen thousand, eight hundred sixty-five".