1557225550 has 12 divisors (see below), whose sum is σ = 2896439616. Its totient is φ = 622890200.

The previous prime is 1557225547. The next prime is 1557225563. The reversal of 1557225550 is 555227551.

It is a congruent number.

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, 15572206 + ... + 15572305.

It is an arithmetic number, because the mean of its divisors is an integer number (241369968).

Almost surely, 2^1557225550 is an apocalyptic number.

1557225550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1557225550 is a deficient number, since it is larger than the sum of its proper divisors (1339214066).

1557225550 is a wasteful number, since it uses less digits than its factorization.

1557225550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31144523 (or 31144518 counting only the distinct ones).

The product of its (nonzero) digits is 87500, while the sum is 37.

The square root of 1557225550 is about 39461.6972518922. The cubic root of 1557225550 is about 1159.0900389447.

The spelling of 1557225550 in words is "one billion, five hundred fifty-seven million, two hundred twenty-five thousand, five hundred fifty".