1553321155 has 16 divisors (see below), whose sum is σ = 1973452320. Its totient is φ = 1170436608.

The previous prime is 1553321153. The next prime is 1553321167. The reversal of 1553321155 is 5511233551.

It is a cyclic number.

It is not a de Polignac number, because 1553321155 - 2¹ = 1553321153 is a prime.

It is a super-2 number, since 2×1553321155² = 4825613221141068050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1553321153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30822 + ... + 63691.

It is an arithmetic number, because the mean of its divisors is an integer number (123340770).

Almost surely, 2^1553321155 is an apocalyptic number.

1553321155 is a deficient number, since it is larger than the sum of its proper divisors (420131165).

1553321155 is a wasteful number, since it uses less digits than its factorization.

1553321155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94710.

The product of its digits is 11250, while the sum is 31.

The square root of 1553321155 is about 39412.1955110344. The cubic root of 1553321155 is about 1158.1205084670.

The spelling of 1553321155 in words is "one billion, five hundred fifty-three million, three hundred twenty-one thousand, one hundred fifty-five".