225656780 has 12 divisors (see below), whose sum is σ = 473879280. Its totient is φ = 90262704.

The previous prime is 225656779. The next prime is 225656803. The reversal of 225656780 is 87656522.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5641400 + ... + 5641439.

It is an arithmetic number, because the mean of its divisors is an integer number (39489940).

Almost surely, 2^225656780 is an apocalyptic number.

225656780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225656780 is an abundant number, since it is smaller than the sum of its proper divisors (248222500).

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

225656780 is a wasteful number, since it uses less digits than its factorization.

225656780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11282848 (or 11282846 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 225656780 is about 15021.8767136467. The cubic root of 225656780 is about 608.8114274204.

The spelling of 225656780 in words is "two hundred twenty-five million, six hundred fifty-six thousand, seven hundred eighty".