216425767 has 2 divisors, whose sum is σ = 216425768. Its totient is φ = 216425766.

The previous prime is 216425723. The next prime is 216425773. The reversal of 216425767 is 767524612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216425767 is a prime.

It is a super-2 number, since 2×216425767² = 93680225243076578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216425717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108212883 + 108212884.

It is an arithmetic number, because the mean of its divisors is an integer number (108212884).

Almost surely, 2^216425767 is an apocalyptic number.

216425767 is a deficient number, since it is larger than the sum of its proper divisors (1).

216425767 is an equidigital number, since it uses as much as digits as its factorization.

216425767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 40.

The square root of 216425767 is about 14711.4162132678. The cubic root of 216425767 is about 600.3939699599.

The spelling of 216425767 in words is "two hundred sixteen million, four hundred twenty-five thousand, seven hundred sixty-seven".