222387881 has 4 divisors (see below), whose sum is σ = 223442064. Its totient is φ = 221333700.

The previous prime is 222387877. The next prime is 222387889. The reversal of 222387881 is 188783222.

It is a happy number.

222387881 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 188783222 = 2 ⋅94391611.

It is a cyclic number.

It is not a de Polignac number, because 222387881 - 2² = 222387877 is a prime.

It is a super-2 number, since 2×222387881² = 98912739231340322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (222387889) 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, 526775 + ... + 527196.

It is an arithmetic number, because the mean of its divisors is an integer number (55860516).

Almost surely, 2^222387881 is an apocalyptic number.

It is an amenable number.

222387881 is a deficient number, since it is larger than the sum of its proper divisors (1054183).

222387881 is a wasteful number, since it uses less digits than its factorization.

222387881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054182.

The product of its digits is 86016, while the sum is 41.

The square root of 222387881 is about 14912.6751791890. The cubic root of 222387881 is about 605.8573378809.

The spelling of 222387881 in words is "two hundred twenty-two million, three hundred eighty-seven thousand, eight hundred eighty-one".