221079413 has 2 divisors, whose sum is σ = 221079414. Its totient is φ = 221079412.

The previous prime is 221079409. The next prime is 221079451. The reversal of 221079413 is 314970122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181225444 + 39853969 = 13462^2 + 6313^2 .

It is a cyclic number.

It is not a de Polignac number, because 221079413 - 2² = 221079409 is a prime.

It is a super-2 number, since 2×221079413² = 97752213704849138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221070413) 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, 110539706 + 110539707.

It is an arithmetic number, because the mean of its divisors is an integer number (110539707).

Almost surely, 2^221079413 is an apocalyptic number.

It is an amenable number.

221079413 is a deficient number, since it is larger than the sum of its proper divisors (1).

221079413 is an equidigital number, since it uses as much as digits as its factorization.

221079413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 221079413 is about 14868.7394556499. The cubic root of 221079413 is about 604.6667682018. Note that the first 3 decimals are identical.

The spelling of 221079413 in words is "two hundred twenty-one million, seventy-nine thousand, four hundred thirteen".