225539779 has 2 divisors, whose sum is σ = 225539780. Its totient is φ = 225539778.

The previous prime is 225539761. The next prime is 225539789. The reversal of 225539779 is 977935522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225539779 - 2¹⁷ = 225408707 is a prime.

It is a super-2 number, since 2×225539779² = 101736383822737682, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (225539719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112769889 + 112769890.

It is an arithmetic number, because the mean of its divisors is an integer number (112769890).

Almost surely, 2^225539779 is an apocalyptic number.

225539779 is a deficient number, since it is larger than the sum of its proper divisors (1).

225539779 is an equidigital number, since it uses as much as digits as its factorization.

225539779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1190700, while the sum is 49.

The square root of 225539779 is about 15017.9818550962. The cubic root of 225539779 is about 608.7061881564.

The spelling of 225539779 in words is "two hundred twenty-five million, five hundred thirty-nine thousand, seven hundred seventy-nine".