225216146 has 8 divisors (see below), whose sum is σ = 349473420. Its totient is φ = 108725008.

The previous prime is 225216109. The next prime is 225216179. The reversal of 225216146 is 641612522.

It can be written as a sum of positive squares in 2 ways, for example, as 222457225 + 2758921 = 14915^2 + 1661^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1941461 + ... + 1941576.

Almost surely, 2^225216146 is an apocalyptic number.

225216146 is a deficient number, since it is larger than the sum of its proper divisors (124257274).

225216146 is a wasteful number, since it uses less digits than its factorization.

225216146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3883068.

The product of its digits is 5760, while the sum is 29.

The square root of 225216146 is about 15007.2031371605. The cubic root of 225216146 is about 608.4148992443.

Adding to 225216146 its reverse (641612522), we get a palindrome (866828668).

The spelling of 225216146 in words is "two hundred twenty-five million, two hundred sixteen thousand, one hundred forty-six".