221126413 has 4 divisors (see below), whose sum is σ = 221710240. Its totient is φ = 220542588.

The previous prime is 221126387. The next prime is 221126419. The reversal of 221126413 is 314621122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221126413 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 (221126419) 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, 291345 + ... + 292102.

It is an arithmetic number, because the mean of its divisors is an integer number (55427560).

Almost surely, 2^221126413 is an apocalyptic number.

It is an amenable number.

221126413 is a deficient number, since it is larger than the sum of its proper divisors (583827).

221126413 is an equidigital number, since it uses as much as digits as its factorization.

221126413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583826.

The product of its digits is 576, while the sum is 22.

The square root of 221126413 is about 14870.3198687856. The cubic root of 221126413 is about 604.7096145317.

Adding to 221126413 its reverse (314621122), we get a palindrome (535747535).

The spelling of 221126413 in words is "two hundred twenty-one million, one hundred twenty-six thousand, four hundred thirteen".