225401820820 has 48 divisors (see below), whose sum is σ = 534181132800. Its totient is φ = 79137941120.

The previous prime is 225401820803. The next prime is 225401820857. The reversal of 225401820820 is 28028104522.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17658340 + ... + 17671099.

It is an arithmetic number, because the mean of its divisors is an integer number (11128773600).

Almost surely, 2^225401820820 is an apocalyptic number.

225401820820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225401820820 is an abundant number, since it is smaller than the sum of its proper divisors (308779311980).

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

225401820820 is a wasteful number, since it uses less digits than its factorization.

225401820820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35329488 (or 35329486 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 34.

The spelling of 225401820820 in words is "two hundred twenty-five billion, four hundred one million, eight hundred twenty thousand, eight hundred twenty".