1331522131 has 2 divisors, whose sum is σ = 1331522132. Its totient is φ = 1331522130.

The previous prime is 1331522123. The next prime is 1331522149. The reversal of 1331522131 is 1312251331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1331522131 - 2³ = 1331522123 is a prime.

It is a super-2 number, since 2×1331522131² = 3545902370685562322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1331522431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665761065 + 665761066.

It is an arithmetic number, because the mean of its divisors is an integer number (665761066).

Almost surely, 2^1331522131 is an apocalyptic number.

1331522131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331522131 is an equidigital number, since it uses as much as digits as its factorization.

1331522131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 22.

The square root of 1331522131 is about 36490.0278295317. The cubic root of 1331522131 is about 1100.1438189367.

Adding to 1331522131 its reverse (1312251331), we get a palindrome (2643773462).

The spelling of 1331522131 in words is "one billion, three hundred thirty-one million, five hundred twenty-two thousand, one hundred thirty-one".