2555454521 has 4 divisors (see below), whose sum is σ = 2568695412. Its totient is φ = 2542213632.

The previous prime is 2555454511. The next prime is 2555454523. The reversal of 2555454521 is 1254545552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1490346025 + 1065108496 = 38605^2 + 32636^2 .

It is a cyclic number.

It is not a de Polignac number, because 2555454521 - 2³⁰ = 1481712697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2555454523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6620156 + ... + 6620541.

It is an arithmetic number, because the mean of its divisors is an integer number (642173853).

Almost surely, 2^2555454521 is an apocalyptic number.

It is an amenable number.

2555454521 is a deficient number, since it is larger than the sum of its proper divisors (13240891).

2555454521 is a wasteful number, since it uses less digits than its factorization.

2555454521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13240890.

The product of its digits is 200000, while the sum is 38.

The square root of 2555454521 is about 50551.5036472705. The cubic root of 2555454521 is about 1367.1706256101.

The spelling of 2555454521 in words is "two billion, five hundred fifty-five million, four hundred fifty-four thousand, five hundred twenty-one".