215296931 has 2 divisors, whose sum is σ = 215296932. Its totient is φ = 215296930.

The previous prime is 215296897. The next prime is 215296933. The reversal of 215296931 is 139692512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215296931 - 2¹⁴ = 215280547 is a prime.

It is a super-2 number, since 2×215296931² = 92705536996037522, which contains 22 as substring.

Together with 215296933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (215296933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107648465 + 107648466.

It is an arithmetic number, because the mean of its divisors is an integer number (107648466).

Almost surely, 2^215296931 is an apocalyptic number.

215296931 is a deficient number, since it is larger than the sum of its proper divisors (1).

215296931 is an equidigital number, since it uses as much as digits as its factorization.

215296931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 38.

The square root of 215296931 is about 14673.0000681524. Note that the first 4 decimals coincide. The cubic root of 215296931 is about 599.3483025923.

The spelling of 215296931 in words is "two hundred fifteen million, two hundred ninety-six thousand, nine hundred thirty-one".