225204031 has 4 divisors (see below), whose sum is σ = 242527432. Its totient is φ = 207880632.

The previous prime is 225204013. The next prime is 225204071. The reversal of 225204031 is 130402522.

225204031 = 6124² + 6125² + ... + 6129².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130402522 = 2 ⋅65201261.

It is a cyclic number.

It is not a de Polignac number, because 225204031 - 2⁵ = 225203999 is a prime.

It is a super-2 number, since 2×225204031² = 101433711157297922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225204071) 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, 8661681 + ... + 8661706.

It is an arithmetic number, because the mean of its divisors is an integer number (60631858).

Almost surely, 2^225204031 is an apocalyptic number.

225204031 is a deficient number, since it is larger than the sum of its proper divisors (17323401).

225204031 is a wasteful number, since it uses less digits than its factorization.

225204031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17323400.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 225204031 is about 15006.7994922302. The cubic root of 225204031 is about 608.4039896080.

Adding to 225204031 its reverse (130402522), we get a palindrome (355606553).

The spelling of 225204031 in words is "two hundred twenty-five million, two hundred four thousand, thirty-one".