221357413 has 2 divisors, whose sum is σ = 221357414. Its totient is φ = 221357412.

The previous prime is 221357399. The next prime is 221357473. The reversal of 221357413 is 314753122.

221357413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212488929 + 8868484 = 14577^2 + 2978^2 .

It is a cyclic number.

It is not a de Polignac number, because 221357413 - 2⁹ = 221356901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221357473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110678706 + 110678707.

It is an arithmetic number, because the mean of its divisors is an integer number (110678707).

Almost surely, 2^221357413 is an apocalyptic number.

It is an amenable number.

221357413 is a deficient number, since it is larger than the sum of its proper divisors (1).

221357413 is an equidigital number, since it uses as much as digits as its factorization.

221357413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 221357413 is about 14878.0849910195. The cubic root of 221357413 is about 604.9201114832.

The spelling of 221357413 in words is "two hundred twenty-one million, three hundred fifty-seven thousand, four hundred thirteen".