53249915 has 4 divisors (see below), whose sum is σ = 63899904. Its totient is φ = 42599928.

The previous prime is 53249897. The next prime is 53249921. The reversal of 53249915 is 51994235.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51994235 = 5 ⋅10398847.

It is a cyclic number.

It is not a de Polignac number, because 53249915 - 2⁶ = 53249851 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, 5324987 + ... + 5324996.

It is an arithmetic number, because the mean of its divisors is an integer number (15974976).

Almost surely, 2^53249915 is an apocalyptic number.

53249915 is a deficient number, since it is larger than the sum of its proper divisors (10649989).

53249915 is a wasteful number, since it uses less digits than its factorization.

53249915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10649988.

The product of its digits is 48600, while the sum is 38.

The square root of 53249915 is about 7297.2539355569. The cubic root of 53249915 is about 376.2180600032.

The spelling of 53249915 in words is "fifty-three million, two hundred forty-nine thousand, nine hundred fifteen".