1553311345 has 8 divisors (see below), whose sum is σ = 1866427560. Its totient is φ = 1241013120.

The previous prime is 1553311321. The next prime is 1553311373. The reversal of 1553311345 is 5431133551.

It can be written as a sum of positive squares in 4 ways, for example, as 242064 + 1553069281 = 492^2 + 39409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1553311345 - 2¹³ = 1553303153 is a prime.

It is a super-2 number, since 2×1553311345² = 4825552269011418050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200310 + ... + 207919.

It is an arithmetic number, because the mean of its divisors is an integer number (233303445).

Almost surely, 2^1553311345 is an apocalyptic number.

It is an amenable number.

1553311345 is a deficient number, since it is larger than the sum of its proper divisors (313116215).

1553311345 is an equidigital number, since it uses as much as digits as its factorization.

1553311345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408995.

The product of its digits is 13500, while the sum is 31.

The square root of 1553311345 is about 39412.0710569744. The cubic root of 1553311345 is about 1158.1180704251.

Adding to 1553311345 its reverse (5431133551), we get a palindrome (6984444896).

The spelling of 1553311345 in words is "one billion, five hundred fifty-three million, three hundred eleven thousand, three hundred forty-five".