225123421620 has 24 divisors (see below), whose sum is σ = 630345580704. Its totient is φ = 60032912416.

The previous prime is 225123421613. The next prime is 225123421667. The reversal of 225123421620 is 26124321522.

225123421620 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1876028454 + ... + 1876028573.

It is an arithmetic number, because the mean of its divisors is an integer number (26264399196).

Almost surely, 2^225123421620 is an apocalyptic number.

225123421620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225123421620 is an abundant number, since it is smaller than the sum of its proper divisors (405222159084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225123421620 is a wasteful number, since it uses less digits than its factorization.

225123421620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3752057039 (or 3752057037 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 225123421620 in words is "two hundred twenty-five billion, one hundred twenty-three million, four hundred twenty-one thousand, six hundred twenty".