52621317 has 24 divisors (see below), whose sum is σ = 91440960. Its totient is φ = 28486080.

The previous prime is 52621313. The next prime is 52621321. The reversal of 52621317 is 71312625.

It is a happy number.

52621317 is a `hidden beast` number, since 5 + 2 + 621 + 31 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (52621313) and next prime (52621321).

It is not a de Polignac number, because 52621317 - 2² = 52621313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52621313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20784 + ... + 23177.

It is an arithmetic number, because the mean of its divisors is an integer number (3810040).

Almost surely, 2^52621317 is an apocalyptic number.

52621317 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

52621317 is a deficient number, since it is larger than the sum of its proper divisors (38819643).

52621317 is a wasteful number, since it uses less digits than its factorization.

52621317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43993 (or 43990 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 52621317 is about 7254.0552107080. The cubic root of 52621317 is about 374.7318189228.

The spelling of 52621317 in words is "fifty-two million, six hundred twenty-one thousand, three hundred seventeen".