225956204609 has 4 divisors (see below), whose sum is σ = 225970336704. Its totient is φ = 225942072516.

The previous prime is 225956204603. The next prime is 225956204657. The reversal of 225956204609 is 906402659522.

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, and also an emirpimes, since its reverse is a distinct semiprime: 906402659522 = 2 ⋅453201329761.

It is a cyclic number.

It is not a de Polignac number, because 225956204609 - 2³⁶ = 157236727873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225956204603) 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, 7042037 + ... + 7074050.

It is an arithmetic number, because the mean of its divisors is an integer number (56492584176).

Almost surely, 2^225956204609 is an apocalyptic number.

It is an amenable number.

225956204609 is a deficient number, since it is larger than the sum of its proper divisors (14132095).

225956204609 is a wasteful number, since it uses less digits than its factorization.

225956204609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14132094.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 225956204609 in words is "two hundred twenty-five billion, nine hundred fifty-six million, two hundred four thousand, six hundred nine".