225443001 has 32 divisors (see below), whose sum is σ = 367331328. Its totient is φ = 120049920.

The previous prime is 225442991. The next prime is 225443017. The reversal of 225443001 is 100344522.

225443001 = 159² + 160² + ... + 879².

It is not a de Polignac number, because 225443001 - 2¹⁰ = 225441977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (225443021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33706 + ... + 39836.

It is an arithmetic number, because the mean of its divisors is an integer number (11479104).

Almost surely, 2^225443001 is an apocalyptic number.

225443001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

225443001 is a deficient number, since it is larger than the sum of its proper divisors (141888327).

225443001 is a wasteful number, since it uses less digits than its factorization.

225443001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6261.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 225443001 is about 15014.7594386324. The cubic root of 225443001 is about 608.6191114322.

Adding to 225443001 its reverse (100344522), we get a palindrome (325787523).

The spelling of 225443001 in words is "two hundred twenty-five million, four hundred forty-three thousand, one".