1553351144 has 16 divisors (see below), whose sum is σ = 2913139620. Its totient is φ = 776513920.

The previous prime is 1553351143. The next prime is 1553351147. The reversal of 1553351144 is 4411533551.

It can be written as a sum of positive squares in 2 ways, for example, as 1213686244 + 339664900 = 34838^2 + 18430^2 .

It is a super-2 number, since 2×1553351144² = 4825799553132217472, 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 1553351144.

It is not an unprimeable number, because it can be changed into a prime (1553351143) 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, 27164 + ... + 62004.

Almost surely, 2^1553351144 is an apocalyptic number.

It is an amenable number.

1553351144 is a deficient number, since it is larger than the sum of its proper divisors (1359788476).

1553351144 is a wasteful number, since it uses less digits than its factorization.

1553351144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40420 (or 40416 counting only the distinct ones).

The product of its digits is 18000, while the sum is 32.

The square root of 1553351144 is about 39412.5759625021. The cubic root of 1553351144 is about 1158.1279614551.

Adding to 1553351144 its reverse (4411533551), we get a palindrome (5964884695).

The spelling of 1553351144 in words is "one billion, five hundred fifty-three million, three hundred fifty-one thousand, one hundred forty-four".