1215132131 has 2 divisors, whose sum is σ = 1215132132. Its totient is φ = 1215132130.

The previous prime is 1215132091. The next prime is 1215132143. The reversal of 1215132131 is 1312315121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1215132131 - 2¹⁸ = 1214869987 is a prime.

It is a super-2 number, since 2×1215132131² = 2953092191577202322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1215132151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607566065 + 607566066.

It is an arithmetic number, because the mean of its divisors is an integer number (607566066).

Almost surely, 2^1215132131 is an apocalyptic number.

1215132131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215132131 is an equidigital number, since it uses as much as digits as its factorization.

1215132131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 20.

The square root of 1215132131 is about 34858.7454019791. The cubic root of 1215132131 is about 1067.1066710864.

Adding to 1215132131 its reverse (1312315121), we get a palindrome (2527447252).

The spelling of 1215132131 in words is "one billion, two hundred fifteen million, one hundred thirty-two thousand, one hundred thirty-one".