215027926931 has 2 divisors, whose sum is σ = 215027926932. Its totient is φ = 215027926930.

The previous prime is 215027926913. The next prime is 215027926933. The reversal of 215027926931 is 139629720512.

Together with previous prime (215027926913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215027926931 - 2³⁴ = 197848057747 is a prime.

It is a super-2 number, since 2×215027926931² (a number of 23 digits) contains 22 as substring.

Together with 215027926933, 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 (215027926933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107513963465 + 107513963466.

It is an arithmetic number, because the mean of its divisors is an integer number (107513963466).

Almost surely, 2^215027926931 is an apocalyptic number.

215027926931 is a deficient number, since it is larger than the sum of its proper divisors (1).

215027926931 is an equidigital number, since it uses as much as digits as its factorization.

215027926931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 215027926931 in words is "two hundred fifteen billion, twenty-seven million, nine hundred twenty-six thousand, nine hundred thirty-one".