1557225236 has 24 divisors (see below), whose sum is σ = 3120457536. Its totient is φ = 666095040.

The previous prime is 1557225233. The next prime is 1557225251. The reversal of 1557225236 is 6325227551.

It is a self number, because there is not a number n which added to its sum of digits gives 1557225236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557225233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38786 + ... + 67961.

It is an arithmetic number, because the mean of its divisors is an integer number (130019064).

Almost surely, 2^1557225236 is an apocalyptic number.

It is an amenable number.

1557225236 is an abundant number, since it is smaller than the sum of its proper divisors (1563232300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1557225236 is a wasteful number, since it uses less digits than its factorization.

1557225236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107279 (or 107277 counting only the distinct ones).

The product of its digits is 126000, while the sum is 38.

The square root of 1557225236 is about 39461.6932733505. The cubic root of 1557225236 is about 1159.0899610382.

The spelling of 1557225236 in words is "one billion, five hundred fifty-seven million, two hundred twenty-five thousand, two hundred thirty-six".