222631 has 4 divisors (see below), whose sum is σ = 224512. Its totient is φ = 220752.

The previous prime is 222619. The next prime is 222643. The reversal of 222631 is 136222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136222 = 2 ⋅68111.

It is an interprime number because it is at equal distance from previous prime (222619) and next prime (222643).

It is a cyclic number.

It is not a de Polignac number, because 222631 - 2¹³ = 214439 is a prime.

It is a super-2 number, since 2×222631² = 99129124322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750 + ... + 1003.

It is an arithmetic number, because the mean of its divisors is an integer number (56128).

2²²²⁶³¹ is an apocalyptic number.

222631 is a deficient number, since it is larger than the sum of its proper divisors (1881).

222631 is a wasteful number, since it uses less digits than its factorization.

222631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880.

The product of its digits is 144, while the sum is 16.

The square root of 222631 is about 471.8378958922. The cubic root of 222631 is about 60.6078036039.

Adding to 222631 its reverse (136222), we get a palindrome (358853).

It can be divided in two parts, 2226 and 31, that multiplied together give a triangular number (69006 = T₃₇₁).

The spelling of 222631 in words is "two hundred twenty-two thousand, six hundred thirty-one".