221319774 has 24 divisors (see below), whose sum is σ = 516413352. Its totient is φ = 68098320.

The previous prime is 221319767. The next prime is 221319811. The reversal of 221319774 is 477913122.

221319774 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221319774² = 97964884726822152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 472672 + ... + 473139.

It is an arithmetic number, because the mean of its divisors is an integer number (21517223).

Almost surely, 2^221319774 is an apocalyptic number.

221319774 is an abundant number, since it is smaller than the sum of its proper divisors (295093578).

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

221319774 is a wasteful number, since it uses less digits than its factorization.

221319774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945832 (or 945829 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 221319774 is about 14876.8200231098. The cubic root of 221319774 is about 604.8858232275.

The spelling of 221319774 in words is "two hundred twenty-one million, three hundred nineteen thousand, seven hundred seventy-four".