2257949621 has 2 divisors, whose sum is σ = 2257949622. Its totient is φ = 2257949620.

The previous prime is 2257949611. The next prime is 2257949671. The reversal of 2257949621 is 1269497522.

It is a happy number.

2257949621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2003547121 + 254402500 = 44761^2 + 15950^2 .

It is a cyclic number.

It is not a de Polignac number, because 2257949621 - 2¹⁸ = 2257687477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2257949611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128974810 + 1128974811.

It is an arithmetic number, because the mean of its divisors is an integer number (1128974811).

Almost surely, 2^2257949621 is an apocalyptic number.

It is an amenable number.

2257949621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2257949621 is an equidigital number, since it uses as much as digits as its factorization.

2257949621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The square root of 2257949621 is about 47517.8873793859. The cubic root of 2257949621 is about 1311.9121350553.

The spelling of 2257949621 in words is "two billion, two hundred fifty-seven million, nine hundred forty-nine thousand, six hundred twenty-one".