225890969 has 6 divisors (see below), whose sum is σ = 229317354. Its totient is φ = 222515040.

The previous prime is 225890953. The next prime is 225890983. The reversal of 225890969 is 969098522.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 207504025 + 18386944 = 14405^2 + 4288^2 .

It is not a de Polignac number, because 225890969 - 2⁴ = 225890953 is a prime.

It is a super-2 number, since 2×225890969² = 102053459751517922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225890909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20672 + ... + 29649.

It is an arithmetic number, because the mean of its divisors is an integer number (38219559).

Almost surely, 2^225890969 is an apocalyptic number.

It is an amenable number.

225890969 is a deficient number, since it is larger than the sum of its proper divisors (3426385).

225890969 is an frugal number, since it uses more digits than its factorization.

225890969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50455 (or 50388 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 225890969 is about 15029.6696237808. The cubic root of 225890969 is about 609.0219649236.

The spelling of 225890969 in words is "two hundred twenty-five million, eight hundred ninety thousand, nine hundred sixty-nine".