215132131 has 2 divisors, whose sum is σ = 215132132. Its totient is φ = 215132130.

The previous prime is 215132123. The next prime is 215132143. The reversal of 215132131 is 131231512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215132131 - 2³ = 215132123 is a prime.

It is a super-2 number, since 2×215132131² = 92563667577202322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215132099 and 215132108.

It is not a weakly prime, because it can be changed into another prime (215132111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107566065 + 107566066.

It is an arithmetic number, because the mean of its divisors is an integer number (107566066).

Almost surely, 2^215132131 is an apocalyptic number.

215132131 is a deficient number, since it is larger than the sum of its proper divisors (1).

215132131 is an equidigital number, since it uses as much as digits as its factorization.

215132131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 19.

The square root of 215132131 is about 14667.3832362832. The cubic root of 215132131 is about 599.1953389426.

Adding to 215132131 its reverse (131231512), we get a palindrome (346363643).

The spelling of 215132131 in words is "two hundred fifteen million, one hundred thirty-two thousand, one hundred thirty-one".