252055621 has 2 divisors, whose sum is σ = 252055622. Its totient is φ = 252055620.

The previous prime is 252055619. The next prime is 252055627. The reversal of 252055621 is 126550252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191822500 + 60233121 = 13850^2 + 7761^2 .

It is a cyclic number.

It is not a de Polignac number, because 252055621 - 2¹ = 252055619 is a prime.

Together with 252055619, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 252055621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252055627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126027810 + 126027811.

It is an arithmetic number, because the mean of its divisors is an integer number (126027811).

Almost surely, 2^252055621 is an apocalyptic number.

It is an amenable number.

252055621 is a deficient number, since it is larger than the sum of its proper divisors (1).

252055621 is an equidigital number, since it uses as much as digits as its factorization.

252055621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 252055621 is about 15876.2596665587. The cubic root of 252055621 is about 631.6824275424.

The spelling of 252055621 in words is "two hundred fifty-two million, fifty-five thousand, six hundred twenty-one".