225662701221 has 16 divisors (see below), whose sum is σ = 334416521920. Its totient is φ = 150396166800.

The previous prime is 225662701219. The next prime is 225662701223. The reversal of 225662701221 is 122107266522.

225662701221 is a `hidden beast` number, since 2 + 2 + 5 + 6 + 627 + 0 + 1 + 2 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (225662701219) and next prime (225662701223).

It is not a de Polignac number, because 225662701221 - 2¹ = 225662701219 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 (225662701223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1176835 + ... + 1355088.

It is an arithmetic number, because the mean of its divisors is an integer number (20901032620).

Almost surely, 2^225662701221 is an apocalyptic number.

It is an amenable number.

225662701221 is a deficient number, since it is larger than the sum of its proper divisors (108753820699).

225662701221 is a wasteful number, since it uses less digits than its factorization.

225662701221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535233 (or 2535227 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

Adding to 225662701221 its reverse (122107266522), we get a palindrome (347769967743).

The spelling of 225662701221 in words is "two hundred twenty-five billion, six hundred sixty-two million, seven hundred one thousand, two hundred twenty-one".