221310400413 has 4 divisors (see below), whose sum is σ = 295080533888. Its totient is φ = 147540266940.

The previous prime is 221310400391. The next prime is 221310400439. The reversal of 221310400413 is 314004013122.

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 not a de Polignac number, because 221310400413 - 2⁶ = 221310400349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221310400413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221310400313) 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, 36885066733 + ... + 36885066738.

It is an arithmetic number, because the mean of its divisors is an integer number (73770133472).

Almost surely, 2^221310400413 is an apocalyptic number.

It is an amenable number.

221310400413 is a deficient number, since it is larger than the sum of its proper divisors (73770133475).

221310400413 is an equidigital number, since it uses as much as digits as its factorization.

221310400413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73770133474.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221310400413 its reverse (314004013122), we get a palindrome (535314413535).

The spelling of 221310400413 in words is "two hundred twenty-one billion, three hundred ten million, four hundred thousand, four hundred thirteen".