222071491 has 4 divisors (see below), whose sum is σ = 222246400. Its totient is φ = 221896584.

The previous prime is 222071489. The next prime is 222071503. The reversal of 222071491 is 194170222.

222071491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194170222 = 2 ⋅97085111.

It is a cyclic number.

It is not a de Polignac number, because 222071491 - 2¹ = 222071489 is a prime.

It is a super-2 number, since 2×222071491² = 98631494229926162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222071471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85536 + ... + 88093.

It is an arithmetic number, because the mean of its divisors is an integer number (55561600).

Almost surely, 2^222071491 is an apocalyptic number.

222071491 is a deficient number, since it is larger than the sum of its proper divisors (174909).

222071491 is a wasteful number, since it uses less digits than its factorization.

222071491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174908.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 222071491 is about 14902.0633135147. The cubic root of 222071491 is about 605.5698848982.

The spelling of 222071491 in words is "two hundred twenty-two million, seventy-one thousand, four hundred ninety-one".