222138481 has 16 divisors (see below), whose sum is σ = 241228800. Its totient is φ = 203893200.

The previous prime is 222138431. The next prime is 222138493. The reversal of 222138481 is 184831222.

It is a happy number.

222138481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 222138481 - 2⁷ = 222138353 is a prime.

It is a super-2 number, since 2×222138481² = 98691009481974722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222138421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78196 + ... + 80986.

It is an arithmetic number, because the mean of its divisors is an integer number (15076800).

Almost surely, 2^222138481 is an apocalyptic number.

It is an amenable number.

222138481 is a deficient number, since it is larger than the sum of its proper divisors (19090319).

222138481 is a wasteful number, since it uses less digits than its factorization.

222138481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940.

The product of its digits is 6144, while the sum is 31.

The square root of 222138481 is about 14904.3108193569. The cubic root of 222138481 is about 605.6307707686.

The spelling of 222138481 in words is "two hundred twenty-two million, one hundred thirty-eight thousand, four hundred eighty-one".