2555126621 has 2 divisors, whose sum is σ = 2555126622. Its totient is φ = 2555126620.

The previous prime is 2555126611. The next prime is 2555126633. The reversal of 2555126621 is 1266215552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2356034521 + 199092100 = 48539^2 + 14110^2 .

It is a cyclic number.

It is not a de Polignac number, because 2555126621 - 2²² = 2550932317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2555126611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277563310 + 1277563311.

It is an arithmetic number, because the mean of its divisors is an integer number (1277563311).

Almost surely, 2^2555126621 is an apocalyptic number.

It is an amenable number.

2555126621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2555126621 is an equidigital number, since it uses as much as digits as its factorization.

2555126621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 35.

The square root of 2555126621 is about 50548.2603162562. The cubic root of 2555126621 is about 1367.1121475038.

The spelling of 2555126621 in words is "two billion, five hundred fifty-five million, one hundred twenty-six thousand, six hundred twenty-one".