1315531253 has 16 divisors (see below), whose sum is σ = 1446768000. Its totient is φ = 1190629440.

The previous prime is 1315531249. The next prime is 1315531279. The reversal of 1315531253 is 3521355131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1315531253 - 2² = 1315531249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315530253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514823 + ... + 517371.

It is an arithmetic number, because the mean of its divisors is an integer number (90423000).

Almost surely, 2^1315531253 is an apocalyptic number.

It is an amenable number.

1315531253 is a deficient number, since it is larger than the sum of its proper divisors (131236747).

1315531253 is a wasteful number, since it uses less digits than its factorization.

1315531253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3772.

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

The square root of 1315531253 is about 36270.2530043561. The cubic root of 1315531253 is about 1095.7220213935.

Adding to 1315531253 its reverse (3521355131), we get a palindrome (4836886384).

The spelling of 1315531253 in words is "one billion, three hundred fifteen million, five hundred thirty-one thousand, two hundred fifty-three".