222651 has 24 divisors (see below), whose sum is σ = 380016. Its totient is φ = 123840.

The previous prime is 222647. The next prime is 222659. The reversal of 222651 is 156222.

It is not a de Polignac number, because 222651 - 2² = 222647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1201 + ... + 1373.

It is an arithmetic number, because the mean of its divisors is an integer number (15834).

2²²²⁶⁵¹ is an apocalyptic number.

222651 is a deficient number, since it is larger than the sum of its proper divisors (157365).

222651 is a wasteful number, since it uses less digits than its factorization.

222651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 200 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 222651 is about 471.8590891357. The cubic root of 222651 is about 60.6096184452.

Adding to 222651 its reverse (156222), we get a palindrome (378873).

It can be divided in two parts, 2226 and 51, that multiplied together give a triangular number (113526 = T₄₇₆).

The spelling of 222651 in words is "two hundred twenty-two thousand, six hundred fifty-one".