53391715 has 8 divisors (see below), whose sum is σ = 68998608. Its totient is φ = 39427680.

The previous prime is 53391683. The next prime is 53391719. The reversal of 53391715 is 51719335.

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

It is not a de Polignac number, because 53391715 - 2⁵ = 53391683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53391719) 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, 410641 + ... + 410770.

It is an arithmetic number, because the mean of its divisors is an integer number (8624826).

Almost surely, 2^53391715 is an apocalyptic number.

53391715 is a deficient number, since it is larger than the sum of its proper divisors (15606893).

53391715 is a wasteful number, since it uses less digits than its factorization.

53391715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821429.

The product of its digits is 14175, while the sum is 34.

The square root of 53391715 is about 7306.9634596048. The cubic root of 53391715 is about 376.5517095959.

The spelling of 53391715 in words is "fifty-three million, three hundred ninety-one thousand, seven hundred fifteen".