221452373 has 2 divisors, whose sum is σ = 221452374. Its totient is φ = 221452372.

The previous prime is 221452351. The next prime is 221452379. The reversal of 221452373 is 373254122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116143729 + 105308644 = 10777^2 + 10262^2 .

It is a cyclic number.

It is not a de Polignac number, because 221452373 - 2¹² = 221448277 is a prime.

It is a super-2 number, since 2×221452373² = 98082307014662258, 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 (221452379) by changing a digit.

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 as a sum of consecutive naturals, namely, 110726186 + 110726187.

It is an arithmetic number, because the mean of its divisors is an integer number (110726187).

Almost surely, 2^221452373 is an apocalyptic number.

It is an amenable number.

221452373 is a deficient number, since it is larger than the sum of its proper divisors (1).

221452373 is an equidigital number, since it uses as much as digits as its factorization.

221452373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 29.

The square root of 221452373 is about 14881.2759197590. The cubic root of 221452373 is about 605.0066005700.

The spelling of 221452373 in words is "two hundred twenty-one million, four hundred fifty-two thousand, three hundred seventy-three".