1531445131 has 2 divisors, whose sum is σ = 1531445132. Its totient is φ = 1531445130.

The previous prime is 1531445117. The next prime is 1531445189. The reversal of 1531445131 is 1315441351.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1531445131 - 2⁹ = 1531444619 is a prime.

It is a super-2 number, since 2×1531445131² = 4690648378527214322, 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 1531445131.

It is not a weakly prime, because it can be changed into another prime (1531445231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765722565 + 765722566.

It is an arithmetic number, because the mean of its divisors is an integer number (765722566).

Almost surely, 2^1531445131 is an apocalyptic number.

1531445131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531445131 is an equidigital number, since it uses as much as digits as its factorization.

1531445131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 1531445131 is about 39133.6828192799. The cubic root of 1531445131 is about 1152.6580308830.

Adding to 1531445131 its reverse (1315441351), we get a palindrome (2846886482).

The spelling of 1531445131 in words is "one billion, five hundred thirty-one million, four hundred forty-five thousand, one hundred thirty-one".