52622821 has 2 divisors, whose sum is σ = 52622822. Its totient is φ = 52622820.

The previous prime is 52622819. The next prime is 52622833. The reversal of 52622821 is 12822625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50552100 + 2070721 = 7110^2 + 1439^2 .

It is a cyclic number.

It is not a de Polignac number, because 52622821 - 2¹ = 52622819 is a prime.

It is a super-2 number, since 2×52622821² = 5538322579996082, which contains 22 as substring.

Together with 52622819, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 52622821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52622851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26311410 + 26311411.

It is an arithmetic number, because the mean of its divisors is an integer number (26311411).

Almost surely, 2^52622821 is an apocalyptic number.

It is an amenable number.

52622821 is a deficient number, since it is larger than the sum of its proper divisors (1).

52622821 is an equidigital number, since it uses as much as digits as its factorization.

52622821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 28.

The square root of 52622821 is about 7254.1588761206. The cubic root of 52622821 is about 374.7353890304.

The spelling of 52622821 in words is "fifty-two million, six hundred twenty-two thousand, eight hundred twenty-one".