221074386 has 32 divisors (see below), whose sum is σ = 501224640. Its totient is φ = 64442304.

The previous prime is 221074351. The next prime is 221074387. The reversal of 221074386 is 683470122.

It is not an unprimeable number, because it can be changed into a prime (221074387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73105 + ... + 76068.

It is an arithmetic number, because the mean of its divisors is an integer number (15663270).

Almost surely, 2^221074386 is an apocalyptic number.

221074386 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

221074386 is an abundant number, since it is smaller than the sum of its proper divisors (280150254).

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

221074386 is a wasteful number, since it uses less digits than its factorization.

221074386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149210.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 221074386 is about 14868.5704087515. The cubic root of 221074386 is about 604.6621851083.

The spelling of 221074386 in words is "two hundred twenty-one million, seventy-four thousand, three hundred eighty-six".