225919450687 has 4 divisors (see below), whose sum is σ = 258193657936. Its totient is φ = 193645243440.

The previous prime is 225919450621. The next prime is 225919450721. The reversal of 225919450687 is 786054919522.

It is a happy number.

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-225919450687 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 (225919456687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16137103614 + ... + 16137103627.

It is an arithmetic number, because the mean of its divisors is an integer number (64548414484).

Almost surely, 2^225919450687 is an apocalyptic number.

225919450687 is a deficient number, since it is larger than the sum of its proper divisors (32274207249).

225919450687 is an equidigital number, since it uses as much as digits as its factorization.

225919450687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32274207248.

The product of its (nonzero) digits is 10886400, while the sum is 58.

The spelling of 225919450687 in words is "two hundred twenty-five billion, nine hundred nineteen million, four hundred fifty thousand, six hundred eighty-seven".