222500100 has 36 divisors (see below), whose sum is σ = 643767824. Its totient is φ = 59333280.

The previous prime is 222500077. The next prime is 222500101. The reversal of 222500100 is 1005222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (222500101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370534 + ... + 371133.

Almost surely, 2^222500100 is an apocalyptic number.

222500100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222500100 is an abundant number, since it is smaller than the sum of its proper divisors (421267724).

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

222500100 is a wasteful number, since it uses less digits than its factorization.

222500100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741684 (or 741677 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 222500100 is about 14916.4372421835. The cubic root of 222500100 is about 605.9592278334.

Adding to 222500100 its reverse (1005222), we get a palindrome (223505322).

The spelling of 222500100 in words is "two hundred twenty-two million, five hundred thousand, one hundred".