52517621 has 8 divisors (see below), whose sum is σ = 56797440. Its totient is φ = 48272112.

The previous prime is 52517561. The next prime is 52517623. The reversal of 52517621 is 12671525.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52517621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52517623) 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, 5345 + ... + 11558.

It is an arithmetic number, because the mean of its divisors is an integer number (7099680).

Almost surely, 2^52517621 is an apocalyptic number.

It is an amenable number.

52517621 is a deficient number, since it is larger than the sum of its proper divisors (4279819).

52517621 is a wasteful number, since it uses less digits than its factorization.

52517621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17155.

The product of its digits is 4200, while the sum is 29.

The square root of 52517621 is about 7246.9042356030. The cubic root of 52517621 is about 374.4855071893.

The spelling of 52517621 in words is "fifty-two million, five hundred seventeen thousand, six hundred twenty-one".