216158226 has 32 divisors (see below), whose sum is σ = 447737856. Its totient is φ = 69498000.

The previous prime is 216158177. The next prime is 216158249. The reversal of 216158226 is 622851612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59811 + ... + 63321.

It is an arithmetic number, because the mean of its divisors is an integer number (13991808).

Almost surely, 2^216158226 is an apocalyptic number.

216158226 is an abundant number, since it is smaller than the sum of its proper divisors (231579630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216158226 is a wasteful number, since it uses less digits than its factorization.

216158226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3878.

The product of its digits is 11520, while the sum is 33.

The square root of 216158226 is about 14702.3204291023. The cubic root of 216158226 is about 600.1464697970.

The spelling of 216158226 in words is "two hundred sixteen million, one hundred fifty-eight thousand, two hundred twenty-six".