222157800 has 144 divisors (see below), whose sum is σ = 755576640. Its totient is φ = 58488960.

The previous prime is 222157769. The next prime is 222157801. The reversal of 222157800 is 8751222.

It is not an unprimeable number, because it can be changed into a prime (222157801) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 148657 + ... + 150143.

It is an arithmetic number, because the mean of its divisors is an integer number (5247060).

Almost surely, 2^222157800 is an apocalyptic number.

222157800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222157800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377788320).

222157800 is an abundant number, since it is smaller than the sum of its proper divisors (533418840).

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

222157800 is a wasteful number, since it uses less digits than its factorization.

222157800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592 (or 1580 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 222157800 is about 14904.9589063506. The cubic root of 222157800 is about 605.6483271471.

The spelling of 222157800 in words is "two hundred twenty-two million, one hundred fifty-seven thousand, eight hundred".