1531133525 has 12 divisors (see below), whose sum is σ = 1998532800. Its totient is φ = 1160437680.

The previous prime is 1531133521. The next prime is 1531133533. The reversal of 1531133525 is 5253311351.

It is a happy number.

It is not a de Polignac number, because 1531133525 - 2² = 1531133521 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531133521) 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, 1611245 + ... + 1612194.

It is an arithmetic number, because the mean of its divisors is an integer number (166544400).

Almost surely, 2^1531133525 is an apocalyptic number.

It is an amenable number.

1531133525 is a deficient number, since it is larger than the sum of its proper divisors (467399275).

1531133525 is a wasteful number, since it uses less digits than its factorization.

1531133525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223468 (or 3223463 counting only the distinct ones).

The product of its digits is 6750, while the sum is 29.

The square root of 1531133525 is about 39129.7013149858. The cubic root of 1531133525 is about 1152.5798477529.

Adding to 1531133525 its reverse (5253311351), we get a palindrome (6784444876).

The spelling of 1531133525 in words is "one billion, five hundred thirty-one million, one hundred thirty-three thousand, five hundred twenty-five".