221411513 has 2 divisors, whose sum is σ = 221411514. Its totient is φ = 221411512.

The previous prime is 221411507. The next prime is 221411557. The reversal of 221411513 is 315114122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200279104 + 21132409 = 14152^2 + 4597^2 .

It is a cyclic number.

It is not a de Polignac number, because 221411513 - 2²⁰ = 220362937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (221410513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110705756 + 110705757.

It is an arithmetic number, because the mean of its divisors is an integer number (110705757).

Almost surely, 2^221411513 is an apocalyptic number.

It is an amenable number.

221411513 is a deficient number, since it is larger than the sum of its proper divisors (1).

221411513 is an equidigital number, since it uses as much as digits as its factorization.

221411513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 20.

The square root of 221411513 is about 14879.9029902752. The cubic root of 221411513 is about 604.9693885201.

Adding to 221411513 its reverse (315114122), we get a palindrome (536525635).

The spelling of 221411513 in words is "two hundred twenty-one million, four hundred eleven thousand, five hundred thirteen".