174072221 has 2 divisors, whose sum is σ = 174072222. Its totient is φ = 174072220.

The previous prime is 174072113. The next prime is 174072247. The reversal of 174072221 is 122270471.

It is an a-pointer prime, because the next prime (174072247) can be obtained adding 174072221 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173949721 + 122500 = 13189^2 + 350^2 .

It is a cyclic number.

It is not a de Polignac number, because 174072221 - 2²⁶ = 106963357 is a prime.

It is a super-2 number, since 2×174072221² = 60602276247745682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (174072251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87036110 + 87036111.

It is an arithmetic number, because the mean of its divisors is an integer number (87036111).

Almost surely, 2^174072221 is an apocalyptic number.

It is an amenable number.

174072221 is a deficient number, since it is larger than the sum of its proper divisors (1).

174072221 is an equidigital number, since it uses as much as digits as its factorization.

174072221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 174072221 is about 13193.6432042101. The cubic root of 174072221 is about 558.3542465670.

The spelling of 174072221 in words is "one hundred seventy-four million, seventy-two thousand, two hundred twenty-one".