225779977529 has 2 divisors, whose sum is σ = 225779977530. Its totient is φ = 225779977528.

The previous prime is 225779977513. The next prime is 225779977531. The reversal of 225779977529 is 925779977522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212410374400 + 13369603129 = 460880^2 + 115627^2 .

It is a cyclic number.

It is not a de Polignac number, because 225779977529 - 2⁴ = 225779977513 is a prime.

Together with 225779977531, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (225779977729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112889988764 + 112889988765.

It is an arithmetic number, because the mean of its divisors is an integer number (112889988765).

Almost surely, 2^225779977529 is an apocalyptic number.

It is an amenable number.

225779977529 is a deficient number, since it is larger than the sum of its proper divisors (1).

225779977529 is an equidigital number, since it uses as much as digits as its factorization.

225779977529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 350065800, while the sum is 71.

The spelling of 225779977529 in words is "two hundred twenty-five billion, seven hundred seventy-nine million, nine hundred seventy-seven thousand, five hundred twenty-nine".