225021665507 has 16 divisors (see below), whose sum is σ = 240592867200. Its totient is φ = 209828361600.

The previous prime is 225021665461. The next prime is 225021665509. The reversal of 225021665507 is 705566120522.

It is a cyclic number.

It is not a de Polignac number, because 225021665507 - 2⁸ = 225021665251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225021665509) 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, 1532507 + ... + 1672907.

It is an arithmetic number, because the mean of its divisors is an integer number (15037054200).

Almost surely, 2^225021665507 is an apocalyptic number.

225021665507 is a deficient number, since it is larger than the sum of its proper divisors (15571201693).

225021665507 is a wasteful number, since it uses less digits than its factorization.

225021665507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141746.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 225021665507 in words is "two hundred twenty-five billion, twenty-one million, six hundred sixty-five thousand, five hundred seven".