221475626213 has 4 divisors (see below), whose sum is σ = 221476580460. Its totient is φ = 221474671968.

The previous prime is 221475626171. The next prime is 221475626243. The reversal of 221475626213 is 312626574122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 180405766564 + 41069859649 = 424742^2 + 202657^2 .

It is a cyclic number.

It is not a de Polignac number, because 221475626213 - 2¹⁸ = 221475364069 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 (221475626243) 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, 120731 + ... + 676407.

It is an arithmetic number, because the mean of its divisors is an integer number (55369145115).

Almost surely, 2^221475626213 is an apocalyptic number.

It is an amenable number.

221475626213 is a deficient number, since it is larger than the sum of its proper divisors (954247).

221475626213 is an equidigital number, since it uses as much as digits as its factorization.

221475626213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954246.

The product of its digits is 241920, while the sum is 41.

The spelling of 221475626213 in words is "two hundred twenty-one billion, four hundred seventy-five million, six hundred twenty-six thousand, two hundred thirteen".