225123100 has 36 divisors (see below), whose sum is σ = 490175224. Its totient is φ = 89743680.

The previous prime is 225123089. The next prime is 225123127. The reversal of 225123100 is 1321522.

It is a super-2 number, since 2×225123100² = 101360820307220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27034 + ... + 34366.

Almost surely, 2^225123100 is an apocalyptic number.

225123100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225123100 is an abundant number, since it is smaller than the sum of its proper divisors (265052124).

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

225123100 is a wasteful number, since it uses less digits than its factorization.

225123100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7654 (or 7647 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 225123100 is about 15004.1027722420. The cubic root of 225123100 is about 608.3311006778.

Adding to 225123100 its reverse (1321522), we get a palindrome (226444622).

The spelling of 225123100 in words is "two hundred twenty-five million, one hundred twenty-three thousand, one hundred".