222131340 has 36 divisors (see below), whose sum is σ = 673798944. Its totient is φ = 59234976.

The previous prime is 222131279. The next prime is 222131359. The reversal of 222131340 is 43131222.

It is a tau number, because it is divible by the number of its divisors (36).

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

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, 616852 + ... + 617211.

Almost surely, 2^222131340 is an apocalyptic number.

222131340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222131340 is an abundant number, since it is smaller than the sum of its proper divisors (451667604).

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

222131340 is a wasteful number, since it uses less digits than its factorization.

222131340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234078 (or 1234073 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 222131340 is about 14904.0712558683. The cubic root of 222131340 is about 605.6242810396.

Adding to 222131340 its reverse (43131222), we get a palindrome (265262562).

The spelling of 222131340 in words is "two hundred twenty-two million, one hundred thirty-one thousand, three hundred forty".