225021670028 has 24 divisors (see below), whose sum is σ = 407794474080. Its totient is φ = 108517109120.

The previous prime is 225021670021. The next prime is 225021670051. The reversal of 225021670028 is 820076120522.

It is a super-2 number, since 2×225021670028² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 225021670028.

It is not an unprimeable number, because it can be changed into a prime (225021670021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907208 + ... + 1128303.

It is an arithmetic number, because the mean of its divisors is an integer number (16991436420).

Almost surely, 2^225021670028 is an apocalyptic number.

It is an amenable number.

225021670028 is a deficient number, since it is larger than the sum of its proper divisors (182772804052).

225021670028 is a wasteful number, since it uses less digits than its factorization.

225021670028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036497 (or 2036495 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The spelling of 225021670028 in words is "two hundred twenty-five billion, twenty-one million, six hundred seventy thousand, twenty-eight".