2555221545 has 56 divisors (see below), whose sum is σ = 4666358016. Its totient is φ = 1342316448.

The previous prime is 2555221541. The next prime is 2555221549. The reversal of 2555221545 is 5451225552.

It is an interprime number because it is at equal distance from previous prime (2555221541) and next prime (2555221549).

It is not a de Polignac number, because 2555221545 - 2² = 2555221541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2555221541) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 238984 + ... + 249446.

Almost surely, 2^2555221545 is an apocalyptic number.

It is an amenable number.

2555221545 is a deficient number, since it is larger than the sum of its proper divisors (2111136471).

2555221545 is an equidigital number, since it uses as much as digits as its factorization.

2555221545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10553 (or 10538 counting only the distinct ones).

The product of its digits is 100000, while the sum is 36.

The square root of 2555221545 is about 50549.1992518180. The cubic root of 2555221545 is about 1367.1290768861.

The spelling of 2555221545 in words is "two billion, five hundred fifty-five million, two hundred twenty-one thousand, five hundred forty-five".