221001413 has 4 divisors (see below), whose sum is σ = 222614700. Its totient is φ = 219388128.

The previous prime is 221001409. The next prime is 221001421. The reversal of 221001413 is 314100122.

221001413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50098084 + 170903329 = 7078^2 + 13073^2 .

It is a cyclic number.

It is not a de Polignac number, because 221001413 - 2² = 221001409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 806438 + ... + 806711.

It is an arithmetic number, because the mean of its divisors is an integer number (55653675).

Almost surely, 2^221001413 is an apocalyptic number.

It is an amenable number.

221001413 is a deficient number, since it is larger than the sum of its proper divisors (1613287).

221001413 is a wasteful number, since it uses less digits than its factorization.

221001413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613286.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 221001413 is about 14866.1162715754. The cubic root of 221001413 is about 604.5956481231.

Adding to 221001413 its reverse (314100122), we get a palindrome (535101535).

The spelling of 221001413 in words is "two hundred twenty-one million, one thousand, four hundred thirteen".