216425679 has 8 divisors (see below), whose sum is σ = 292632192. Its totient is φ = 142251480.

The previous prime is 216425669. The next prime is 216425681. The reversal of 216425679 is 976524612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216425679 - 2⁷ = 216425551 is a prime.

It is a super-2 number, since 2×216425679² = 93680149061222082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216425679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216425669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507829 + ... + 508254.

It is an arithmetic number, because the mean of its divisors is an integer number (36579024).

Almost surely, 2^216425679 is an apocalyptic number.

216425679 is a deficient number, since it is larger than the sum of its proper divisors (76206513).

216425679 is a wasteful number, since it uses less digits than its factorization.

216425679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016157.

The product of its digits is 181440, while the sum is 42.

The square root of 216425679 is about 14711.4132223930. The cubic root of 216425679 is about 600.3938885853.

The spelling of 216425679 in words is "two hundred sixteen million, four hundred twenty-five thousand, six hundred seventy-nine".