1553221552 has 10 divisors (see below), whose sum is σ = 3009366788. Its totient is φ = 776610768.

The previous prime is 1553221493. The next prime is 1553221559. The reversal of 1553221552 is 2551223551.

It is not an unprimeable number, because it can be changed into a prime (1553221559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48538158 + ... + 48538189.

Almost surely, 2^1553221552 is an apocalyptic number.

It is an amenable number.

1553221552 is a deficient number, since it is larger than the sum of its proper divisors (1456145236).

1553221552 is an equidigital number, since it uses as much as digits as its factorization.

1553221552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97076355 (or 97076349 counting only the distinct ones).

The product of its digits is 15000, while the sum is 31.

The square root of 1553221552 is about 39410.9318844404. The cubic root of 1553221552 is about 1158.0957540363.

The spelling of 1553221552 in words is "one billion, five hundred fifty-three million, two hundred twenty-one thousand, five hundred fifty-two".