52663621 has 2 divisors, whose sum is σ = 52663622. Its totient is φ = 52663620.

The previous prime is 52663619. The next prime is 52663627. The reversal of 52663621 is 12636625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43428100 + 9235521 = 6590^2 + 3039^2 .

It is a cyclic number.

It is not a de Polignac number, because 52663621 - 2¹ = 52663619 is a prime.

Together with 52663619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52663627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26331810 + 26331811.

It is an arithmetic number, because the mean of its divisors is an integer number (26331811).

Almost surely, 2^52663621 is an apocalyptic number.

It is an amenable number.

52663621 is a deficient number, since it is larger than the sum of its proper divisors (1).

52663621 is an equidigital number, since it uses as much as digits as its factorization.

52663621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 52663621 is about 7256.9705111706. The cubic root of 52663621 is about 374.8322117516.

The spelling of 52663621 in words is "fifty-two million, six hundred sixty-three thousand, six hundred twenty-one".