1552431131 has 4 divisors (see below), whose sum is σ = 1552517664. Its totient is φ = 1552344600.

The previous prime is 1552431121. The next prime is 1552431137. The reversal of 1552431131 is 1311342551.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1311342551 = 19 ⋅69018029.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1552431131 is a prime.

It is a super-2 number, since 2×1552431131² = 4820084832995878322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1552431131.

It is not an unprimeable number, because it can be changed into a prime (1552431137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5180 + ... + 55961.

It is an arithmetic number, because the mean of its divisors is an integer number (388129416).

Almost surely, 2^1552431131 is an apocalyptic number.

1552431131 is a deficient number, since it is larger than the sum of its proper divisors (86533).

1552431131 is an equidigital number, since it uses as much as digits as its factorization.

1552431131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86532.

The product of its digits is 1800, while the sum is 26.

The square root of 1552431131 is about 39400.9026673248. The cubic root of 1552431131 is about 1157.8992724025.

Adding to 1552431131 its reverse (1311342551), we get a palindrome (2863773682).

The spelling of 1552431131 in words is "one billion, five hundred fifty-two million, four hundred thirty-one thousand, one hundred thirty-one".