216156607 has 2 divisors, whose sum is σ = 216156608. Its totient is φ = 216156606.

The previous prime is 216156587. The next prime is 216156623. The reversal of 216156607 is 706651612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216156607 is a prime.

It is equal to p_11922577 and since 216156607 and 11922577 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216156697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108078303 + 108078304.

It is an arithmetic number, because the mean of its divisors is an integer number (108078304).

Almost surely, 2^216156607 is an apocalyptic number.

216156607 is a deficient number, since it is larger than the sum of its proper divisors (1).

216156607 is an equidigital number, since it uses as much as digits as its factorization.

216156607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 216156607 is about 14702.2653696633. The cubic root of 216156607 is about 600.1449714508.

The spelling of 216156607 in words is "two hundred sixteen million, one hundred fifty-six thousand, six hundred seven".