225151851 has 4 divisors (see below), whose sum is σ = 300202472. Its totient is φ = 150101232.

The previous prime is 225151831. The next prime is 225151867. The reversal of 225151851 is 158151522.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 225151851 - 2⁵ = 225151819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225151831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37525306 + ... + 37525311.

It is an arithmetic number, because the mean of its divisors is an integer number (75050618).

Almost surely, 2^225151851 is an apocalyptic number.

225151851 is a deficient number, since it is larger than the sum of its proper divisors (75050621).

225151851 is an equidigital number, since it uses as much as digits as its factorization.

225151851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75050620.

The product of its digits is 4000, while the sum is 30.

The square root of 225151851 is about 15005.0608462612. The cubic root of 225151851 is about 608.3569967068.

It can be divided in two parts, 225 and 151851, that added together give a triangular number (152076 = T₅₅₁).

The spelling of 225151851 in words is "two hundred twenty-five million, one hundred fifty-one thousand, eight hundred fifty-one".