53731217 has 4 divisors (see below), whose sum is σ = 53769216. Its totient is φ = 53693220.

The previous prime is 53731211. The next prime is 53731231. The reversal of 53731217 is 71213735.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53731217 - 2⁸ = 53730961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53731217.

It is not an unprimeable number, because it can be changed into a prime (53731211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16793 + ... + 19734.

It is an arithmetic number, because the mean of its divisors is an integer number (13442304).

Almost surely, 2^53731217 is an apocalyptic number.

It is an amenable number.

53731217 is a deficient number, since it is larger than the sum of its proper divisors (37999).

53731217 is a wasteful number, since it uses less digits than its factorization.

53731217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37998.

The product of its digits is 4410, while the sum is 29.

The square root of 53731217 is about 7330.1580474093. The cubic root of 53731217 is about 377.3481505549.

The spelling of 53731217 in words is "fifty-three million, seven hundred thirty-one thousand, two hundred seventeen".