2557021450 has 12 divisors (see below), whose sum is σ = 4756059990. Its totient is φ = 1022808560.

The previous prime is 2557021447. The next prime is 2557021499. The reversal of 2557021450 is 541207552.

It can be written as a sum of positive squares in 3 ways, for example, as 1208883361 + 1348138089 = 34769^2 + 36717^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25570165 + ... + 25570264.

Almost surely, 2^2557021450 is an apocalyptic number.

2557021450 is a deficient number, since it is larger than the sum of its proper divisors (2199038540).

2557021450 is a wasteful number, since it uses less digits than its factorization.

2557021450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51140441 (or 51140436 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 31.

The square root of 2557021450 is about 50566.9996143730. Note that the first 3 decimals coincide. The cubic root of 2557021450 is about 1367.4500046894.

The spelling of 2557021450 in words is "two billion, five hundred fifty-seven million, twenty-one thousand, four hundred fifty".