117215951 has 2 divisors, whose sum is σ = 117215952. Its totient is φ = 117215950.

The previous prime is 117215933. The next prime is 117216017. The reversal of 117215951 is 159512711.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117215951 - 2⁶ = 117215887 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117215911) 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, 58607975 + 58607976.

It is an arithmetic number, because the mean of its divisors is an integer number (58607976).

Almost surely, 2^117215951 is an apocalyptic number.

117215951 is a deficient number, since it is larger than the sum of its proper divisors (1).

117215951 is an equidigital number, since it uses as much as digits as its factorization.

117215951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3150, while the sum is 32.

The square root of 117215951 is about 10826.6315629562. The cubic root of 117215951 is about 489.3980543947.

The spelling of 117215951 in words is "one hundred seventeen million, two hundred fifteen thousand, nine hundred fifty-one".