222631740 has 144 divisors (see below), whose sum is σ = 737493120. Its totient is φ = 56220480.

The previous prime is 222631727. The next prime is 222631741. The reversal of 222631740 is 47136222.

222631740 is a `hidden beast` number, since 2 + 22 + 631 + 7 + 4 + 0 = 666.

222631740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222631741) 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, 91135 + ... + 93545.

It is an arithmetic number, because the mean of its divisors is an integer number (5121480).

Almost surely, 2^222631740 is an apocalyptic number.

222631740 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 222631740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (368746560).

222631740 is an abundant number, since it is smaller than the sum of its proper divisors (514861380).

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

222631740 is a wasteful number, since it uses less digits than its factorization.

222631740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 222631740 is about 14920.8491715452. The cubic root of 222631740 is about 606.0787075498.

Adding to 222631740 its reverse (47136222), we get a palindrome (269767962).

The spelling of 222631740 in words is "two hundred twenty-two million, six hundred thirty-one thousand, seven hundred forty".