225247429991 has 4 divisors (see below), whose sum is σ = 238497278832. Its totient is φ = 211997581152.

The previous prime is 225247429969. The next prime is 225247430021. The reversal of 225247429991 is 199924742522.

225247429991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225247429991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225247429951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6624924395 + ... + 6624924428.

It is an arithmetic number, because the mean of its divisors is an integer number (59624319708).

Almost surely, 2^225247429991 is an apocalyptic number.

225247429991 is a deficient number, since it is larger than the sum of its proper divisors (13249848841).

225247429991 is a wasteful number, since it uses less digits than its factorization.

225247429991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13249848840.

The product of its digits is 6531840, while the sum is 56.

The spelling of 225247429991 in words is "two hundred twenty-five billion, two hundred forty-seven million, four hundred twenty-nine thousand, nine hundred ninety-one".