222161916 has 24 divisors (see below), whose sum is σ = 548871120. Its totient is φ = 69697792.

The previous prime is 222161869. The next prime is 222161941. The reversal of 222161916 is 619161222.

222161916 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

222161916 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 544311 + ... + 544718.

It is an arithmetic number, because the mean of its divisors is an integer number (22869630).

Almost surely, 2^222161916 is an apocalyptic number.

It is an amenable number.

222161916 is an abundant number, since it is smaller than the sum of its proper divisors (326709204).

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

222161916 is a wasteful number, since it uses less digits than its factorization.

222161916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089053 (or 1089051 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 222161916 is about 14905.0969805634. The cubic root of 222161916 is about 605.6520674811.

The spelling of 222161916 in words is "two hundred twenty-two million, one hundred sixty-one thousand, nine hundred sixteen".