1553323044 has 96 divisors (see below), whose sum is σ = 4468473856. Its totient is φ = 408965760.

The previous prime is 1553323039. The next prime is 1553323073. The reversal of 1553323044 is 4403233551.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1055229 + ... + 1056699.

Almost surely, 2^1553323044 is an apocalyptic number.

1553323044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1553323044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2234236928).

1553323044 is an abundant number, since it is smaller than the sum of its proper divisors (2915150812).

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

1553323044 is a wasteful number, since it uses less digits than its factorization.

1553323044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465 (or 2463 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 1553323044 is about 39412.2194756905. The cubic root of 1553323044 is about 1158.1209779318.

Adding to 1553323044 its reverse (4403233551), we get a palindrome (5956556595).

The spelling of 1553323044 in words is "one billion, five hundred fifty-three million, three hundred twenty-three thousand, forty-four".