225015446491 has 4 divisors (see below), whose sum is σ = 245471396184. Its totient is φ = 204559496800.

The previous prime is 225015446479. The next prime is 225015446531. The reversal of 225015446491 is 194644510522.

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 225015446491 - 2⁷ = 225015446363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225015446431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10227974830 + ... + 10227974851.

It is an arithmetic number, because the mean of its divisors is an integer number (61367849046).

Almost surely, 2^225015446491 is an apocalyptic number.

225015446491 is a deficient number, since it is larger than the sum of its proper divisors (20455949693).

225015446491 is a wasteful number, since it uses less digits than its factorization.

225015446491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20455949692.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 225015446491 in words is "two hundred twenty-five billion, fifteen million, four hundred forty-six thousand, four hundred ninety-one".