53215115 has 4 divisors (see below), whose sum is σ = 63858144. Its totient is φ = 42572088.

The previous prime is 53215091. The next prime is 53215121. The reversal of 53215115 is 51151235.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51151235 = 5 ⋅10230247.

It is a cyclic number.

It is not a de Polignac number, because 53215115 - 2⁸ = 53214859 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, 5321507 + ... + 5321516.

It is an arithmetic number, because the mean of its divisors is an integer number (15964536).

Almost surely, 2^53215115 is an apocalyptic number.

53215115 is a deficient number, since it is larger than the sum of its proper divisors (10643029).

53215115 is a wasteful number, since it uses less digits than its factorization.

53215115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10643028.

The product of its digits is 750, while the sum is 23.

The square root of 53215115 is about 7294.8690872421. The cubic root of 53215115 is about 376.1360865291.

The spelling of 53215115 in words is "fifty-three million, two hundred fifteen thousand, one hundred fifteen".