221149086 has 16 divisors (see below), whose sum is σ = 452584704. Its totient is φ = 72001944.

The previous prime is 221149067. The next prime is 221149127. The reversal of 221149086 is 680941122.

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, 428326 + ... + 428841.

It is an arithmetic number, because the mean of its divisors is an integer number (28286544).

Almost surely, 2^221149086 is an apocalyptic number.

221149086 is an abundant number, since it is smaller than the sum of its proper divisors (231435618).

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

221149086 is a wasteful number, since it uses less digits than its factorization.

221149086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857215.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 221149086 is about 14871.0822067528. The cubic root of 221149086 is about 604.7302816128.

The spelling of 221149086 in words is "two hundred twenty-one million, one hundred forty-nine thousand, eighty-six".