225662640551 has 4 divisors (see below), whose sum is σ = 225663618432. Its totient is φ = 225661662672.

The previous prime is 225662640517. The next prime is 225662640601. The reversal of 225662640551 is 155046266522.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 225662640551 - 2²⁶ = 225595531687 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 (225662640251) 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, 70835 + ... + 675531.

It is an arithmetic number, because the mean of its divisors is an integer number (56415904608).

Almost surely, 2^225662640551 is an apocalyptic number.

225662640551 is a deficient number, since it is larger than the sum of its proper divisors (977881).

225662640551 is an equidigital number, since it uses as much as digits as its factorization.

225662640551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977880.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 225662640551 in words is "two hundred twenty-five billion, six hundred sixty-two million, six hundred forty thousand, five hundred fifty-one".