225991554 has 8 divisors (see below), whose sum is σ = 451983120. Its totient is φ = 75330516.

The previous prime is 225991543. The next prime is 225991573. The reversal of 225991554 is 455199522.

It is a happy number.

225991554 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.

225991554 is an admirable number.

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, 18832624 + ... + 18832635.

It is an arithmetic number, because the mean of its divisors is an integer number (56497890).

Almost surely, 2^225991554 is an apocalyptic number.

225991554 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225991554 is a wasteful number, since it uses less digits than its factorization.

225991554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37665264.

The product of its digits is 162000, while the sum is 42.

The square root of 225991554 is about 15033.0154659669. The cubic root of 225991554 is about 609.1123468521.

The spelling of 225991554 in words is "two hundred twenty-five million, nine hundred ninety-one thousand, five hundred fifty-four".