221374927 has 2 divisors, whose sum is σ = 221374928. Its totient is φ = 221374926.

The previous prime is 221374919. The next prime is 221374943. The reversal of 221374927 is 729473122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221374927 - 2³ = 221374919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221374957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110687463 + 110687464.

It is an arithmetic number, because the mean of its divisors is an integer number (110687464).

Almost surely, 2^221374927 is an apocalyptic number.

221374927 is a deficient number, since it is larger than the sum of its proper divisors (1).

221374927 is an equidigital number, since it uses as much as digits as its factorization.

221374927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The square root of 221374927 is about 14878.6735631910. The cubic root of 221374927 is about 604.9360650057.

The spelling of 221374927 in words is "two hundred twenty-one million, three hundred seventy-four thousand, nine hundred twenty-seven".