53091515 has 8 divisors (see below), whose sum is σ = 65263968. Its totient is φ = 41437120.

The previous prime is 53091503. The next prime is 53091517. The reversal of 53091515 is 51519035.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-53091515 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53091517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129287 + ... + 129696.

It is an arithmetic number, because the mean of its divisors is an integer number (8157996).

Almost surely, 2^53091515 is an apocalyptic number.

53091515 is a deficient number, since it is larger than the sum of its proper divisors (12172453).

53091515 is a wasteful number, since it uses less digits than its factorization.

53091515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259029.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 53091515 is about 7286.3924544318. The cubic root of 53091515 is about 375.8446501553.

The spelling of 53091515 in words is "fifty-three million, ninety-one thousand, five hundred fifteen".