225070991 has 4 divisors (see below), whose sum is σ = 225284184. Its totient is φ = 224857800.

The previous prime is 225070981. The next prime is 225071009. The reversal of 225070991 is 199070522.

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

It is a cyclic number.

It is not a de Polignac number, because 225070991 - 2⁶ = 225070927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225070931) 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, 105005 + ... + 107126.

It is an arithmetic number, because the mean of its divisors is an integer number (56321046).

Almost surely, 2^225070991 is an apocalyptic number.

225070991 is a deficient number, since it is larger than the sum of its proper divisors (213193).

225070991 is a wasteful number, since it uses less digits than its factorization.

225070991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213192.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 225070991 is about 15002.3661800397. The cubic root of 225070991 is about 608.2841604756.

The spelling of 225070991 in words is "two hundred twenty-five million, seventy thousand, nine hundred ninety-one".