221353074 has 48 divisors (see below), whose sum is σ = 498843072. Its totient is φ = 73564848.

The previous prime is 221353061. The next prime is 221353103. The reversal of 221353074 is 470353122.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 23 ways as a sum of consecutive naturals, for example, 297547 + ... + 298289.

It is an arithmetic number, because the mean of its divisors is an integer number (10392564).

Almost surely, 2^221353074 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221353074, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249421536).

221353074 is an abundant number, since it is smaller than the sum of its proper divisors (277489998).

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

221353074 is an equidigital number, since it uses as much as digits as its factorization.

221353074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373 (or 1361 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 221353074 is about 14877.9391718074. The cubic root of 221353074 is about 604.9161589531.

The spelling of 221353074 in words is "two hundred twenty-one million, three hundred fifty-three thousand, seventy-four".