225210851 has 4 divisors (see below), whose sum is σ = 227741400. Its totient is φ = 222680304.

The previous prime is 225210773. The next prime is 225210889. The reversal of 225210851 is 158012522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158012522 = 2 ⋅79006261.

It is a cyclic number.

It is not a de Polignac number, because 225210851 - 2¹⁰ = 225209827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225210851.

It is not an unprimeable number, because it can be changed into a prime (225210451) 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, 1265141 + ... + 1265318.

It is an arithmetic number, because the mean of its divisors is an integer number (56935350).

Almost surely, 2^225210851 is an apocalyptic number.

225210851 is a deficient number, since it is larger than the sum of its proper divisors (2530549).

225210851 is an equidigital number, since it uses as much as digits as its factorization.

225210851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530548.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 225210851 is about 15007.0267208398. The cubic root of 225210851 is about 608.4101311105.

The spelling of 225210851 in words is "two hundred twenty-five million, two hundred ten thousand, eight hundred fifty-one".