1557224652 has 12 divisors (see below), whose sum is σ = 3633524216. Its totient is φ = 519074880.

The previous prime is 1557224639. The next prime is 1557224659. The reversal of 1557224652 is 2564227551.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1557224652² = 4849897233593042208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1557224652.

It is not an unprimeable number, because it can be changed into a prime (1557224659) 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, 64884349 + ... + 64884372.

Almost surely, 2^1557224652 is an apocalyptic number.

1557224652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1557224652 is an abundant number, since it is smaller than the sum of its proper divisors (2076299564).

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

1557224652 is a wasteful number, since it uses less digits than its factorization.

1557224652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129768728 (or 129768726 counting only the distinct ones).

The product of its digits is 168000, while the sum is 39.

The square root of 1557224652 is about 39461.6858737687. The cubic root of 1557224652 is about 1159.0898161419.

The spelling of 1557224652 in words is "one billion, five hundred fifty-seven million, two hundred twenty-four thousand, six hundred fifty-two".