225661213579 has 2 divisors, whose sum is σ = 225661213580. Its totient is φ = 225661213578.

The previous prime is 225661213513. The next prime is 225661213621. The reversal of 225661213579 is 975312166522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225661213579 - 2⁹ = 225661213067 is a prime.

It is not a weakly prime, because it can be changed into another prime (225661513579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112830606789 + 112830606790.

It is an arithmetic number, because the mean of its divisors is an integer number (112830606790).

Almost surely, 2^225661213579 is an apocalyptic number.

225661213579 is a deficient number, since it is larger than the sum of its proper divisors (1).

225661213579 is an equidigital number, since it uses as much as digits as its factorization.

225661213579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 49.

The spelling of 225661213579 in words is "two hundred twenty-five billion, six hundred sixty-one million, two hundred thirteen thousand, five hundred seventy-nine".