222142140 has 144 divisors (see below), whose sum is σ = 740952576. Its totient is φ = 53424000.

The previous prime is 222142121. The next prime is 222142147. The reversal of 222142140 is 41241222.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222142147) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 298609 + ... + 299351.

It is an arithmetic number, because the mean of its divisors is an integer number (5145504).

Almost surely, 2^222142140 is an apocalyptic number.

222142140 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 222142140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370476288).

222142140 is an abundant number, since it is smaller than the sum of its proper divisors (518810436).

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

222142140 is a wasteful number, since it uses less digits than its factorization.

222142140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920 (or 915 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 222142140 is about 14904.4335685728. The cubic root of 222142140 is about 605.6340960080.

Adding to 222142140 its reverse (41241222), we get a palindrome (263383362).

The spelling of 222142140 in words is "two hundred twenty-two million, one hundred forty-two thousand, one hundred forty".