221285874 has 16 divisors (see below), whose sum is σ = 456848640. Its totient is φ = 71382480.

The previous prime is 221285861. The next prime is 221285879. The reversal of 221285874 is 478582122.

221285874 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221285879) 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, 594669 + ... + 595040.

It is an arithmetic number, because the mean of its divisors is an integer number (28553040).

Almost surely, 2^221285874 is an apocalyptic number.

221285874 is an abundant number, since it is smaller than the sum of its proper divisors (235562766).

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

221285874 is a wasteful number, since it uses less digits than its factorization.

221285874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189745.

The product of its digits is 71680, while the sum is 39.

The square root of 221285874 is about 14875.6806230841. The cubic root of 221285874 is about 604.8549377865.

The spelling of 221285874 in words is "two hundred twenty-one million, two hundred eighty-five thousand, eight hundred seventy-four".