225557620 has 12 divisors (see below), whose sum is σ = 473671044. Its totient is φ = 90223040.

The previous prime is 225557617. The next prime is 225557623. The reversal of 225557620 is 26755522.

It is an interprime number because it is at equal distance from previous prime (225557617) and next prime (225557623).

It can be written as a sum of positive squares in 2 ways, for example, as 160883856 + 64673764 = 12684^2 + 8042^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225557623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5638921 + ... + 5638960.

It is an arithmetic number, because the mean of its divisors is an integer number (39472587).

Almost surely, 2^225557620 is an apocalyptic number.

225557620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225557620 is an abundant number, since it is smaller than the sum of its proper divisors (248113424).

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

225557620 is a wasteful number, since it uses less digits than its factorization.

225557620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11277890 (or 11277888 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 225557620 is about 15018.5758312831. The cubic root of 225557620 is about 608.7222380092.

The spelling of 225557620 in words is "two hundred twenty-five million, five hundred fifty-seven thousand, six hundred twenty".