215407925231 has 2 divisors, whose sum is σ = 215407925232. Its totient is φ = 215407925230.

The previous prime is 215407925179. The next prime is 215407925233. The reversal of 215407925231 is 132529704512.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215407925231 - 2⁶ = 215407925167 is a prime.

It is a super-2 number, since 2×215407925231² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 215407925233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215407925233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107703962615 + 107703962616.

It is an arithmetic number, because the mean of its divisors is an integer number (107703962616).

Almost surely, 2^215407925231 is an apocalyptic number.

215407925231 is a deficient number, since it is larger than the sum of its proper divisors (1).

215407925231 is an equidigital number, since it uses as much as digits as its factorization.

215407925231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 215407925231 in words is "two hundred fifteen billion, four hundred seven million, nine hundred twenty-five thousand, two hundred thirty-one".