53815215 has 16 divisors (see below), whose sum is σ = 86198400. Its totient is φ = 28670112.

The previous prime is 53815207. The next prime is 53815219. The reversal of 53815215 is 51251835.

It is not a de Polignac number, because 53815215 - 2³ = 53815207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53815219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20656 + ... + 23114.

It is an arithmetic number, because the mean of its divisors is an integer number (5387400).

Almost surely, 2^53815215 is an apocalyptic number.

53815215 is a deficient number, since it is larger than the sum of its proper divisors (32383185).

53815215 is a wasteful number, since it uses less digits than its factorization.

53815215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3926.

The product of its digits is 6000, while the sum is 30.

The square root of 53815215 is about 7335.8854271315. The cubic root of 53815215 is about 377.5446842710.

It can be divided in two parts, 538 and 15215, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 53815215 in words is "fifty-three million, eight hundred fifteen thousand, two hundred fifteen".