52445621 has 2 divisors, whose sum is σ = 52445622. Its totient is φ = 52445620.

The previous prime is 52445593. The next prime is 52445623. The reversal of 52445621 is 12654425.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48094225 + 4351396 = 6935^2 + 2086^2 .

It is a cyclic number.

It is not a de Polignac number, because 52445621 - 2⁶ = 52445557 is a prime.

Together with 52445623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52445623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26222810 + 26222811.

It is an arithmetic number, because the mean of its divisors is an integer number (26222811).

Almost surely, 2^52445621 is an apocalyptic number.

It is an amenable number.

52445621 is a deficient number, since it is larger than the sum of its proper divisors (1).

52445621 is an equidigital number, since it uses as much as digits as its factorization.

52445621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 29.

The square root of 52445621 is about 7241.9348933831. The cubic root of 52445621 is about 374.3142929874.

The spelling of 52445621 in words is "fifty-two million, four hundred forty-five thousand, six hundred twenty-one".