225821722 has 8 divisors (see below), whose sum is σ = 387122976. Its totient is φ = 96780732.

The previous prime is 225821689. The next prime is 225821749. The reversal of 225821722 is 227128522.

225821722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8065048 + ... + 8065075.

It is an arithmetic number, because the mean of its divisors is an integer number (48390372).

Almost surely, 2^225821722 is an apocalyptic number.

225821722 is a deficient number, since it is larger than the sum of its proper divisors (161301254).

225821722 is a wasteful number, since it uses less digits than its factorization.

225821722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16130132.

The product of its digits is 8960, while the sum is 31.

The square root of 225821722 is about 15027.3657704869. The cubic root of 225821722 is about 608.9597265581.

The spelling of 225821722 in words is "two hundred twenty-five million, eight hundred twenty-one thousand, seven hundred twenty-two".