225356509 has 16 divisors (see below), whose sum is σ = 262768896. Its totient is φ = 189273600.

The previous prime is 225356503. The next prime is 225356513. The reversal of 225356509 is 905653522.

It is a cyclic number.

It is not a de Polignac number, because 225356509 - 2³ = 225356501 is a prime.

It is a super-2 number, since 2×225356509² = 101571112297334162, 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 (225356501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131949 + ... + 133645.

It is an arithmetic number, because the mean of its divisors is an integer number (16423056).

Almost surely, 2^225356509 is an apocalyptic number.

It is an amenable number.

225356509 is a deficient number, since it is larger than the sum of its proper divisors (37412387).

225356509 is a wasteful number, since it uses less digits than its factorization.

225356509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 225356509 is about 15011.8789297010. The cubic root of 225356509 is about 608.5412685224.

The spelling of 225356509 in words is "two hundred twenty-five million, three hundred fifty-six thousand, five hundred nine".