1553440131 has 12 divisors (see below), whose sum is σ = 2244442200. Its totient is φ = 1035357120.

The previous prime is 1553440081. The next prime is 1553440139. The reversal of 1553440131 is 1310443551.

It is a happy number.

It is not a de Polignac number, because 1553440131 - 2⁶ = 1553440067 is a prime.

It is a super-2 number, since 2×1553440131² = 4826352481202594322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1553440095 and 1553440104.

It is not an unprimeable number, because it can be changed into a prime (1553440139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17820 + ... + 58518.

It is an arithmetic number, because the mean of its divisors is an integer number (187036850).

Almost surely, 2^1553440131 is an apocalyptic number.

1553440131 is a deficient number, since it is larger than the sum of its proper divisors (691002069).

1553440131 is a wasteful number, since it uses less digits than its factorization.

1553440131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44946 (or 44943 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1553440131 is about 39413.7048626490. The cubic root of 1553440131 is about 1158.1500763013.

Adding to 1553440131 its reverse (1310443551), we get a palindrome (2863883682).

The spelling of 1553440131 in words is "one billion, five hundred fifty-three million, four hundred forty thousand, one hundred thirty-one".