222725761 has 4 divisors (see below), whose sum is σ = 222755652. Its totient is φ = 222695872.

The previous prime is 222725759. The next prime is 222725791. The reversal of 222725761 is 167527222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 167527222 = 2 ⋅83763611.

It can be written as a sum of positive squares in 2 ways, for example, as 150798400 + 71927361 = 12280^2 + 8481^2 .

It is a cyclic number.

It is not a de Polignac number, because 222725761 - 2¹ = 222725759 is a prime.

It is a super-2 number, since 2×222725761² = 99213529226058242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222725791) 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, 6285 + ... + 22021.

It is an arithmetic number, because the mean of its divisors is an integer number (55688913).

Almost surely, 2^222725761 is an apocalyptic number.

It is an amenable number.

222725761 is a deficient number, since it is larger than the sum of its proper divisors (29891).

222725761 is a wasteful number, since it uses less digits than its factorization.

222725761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29890.

The product of its digits is 23520, while the sum is 34.

The square root of 222725761 is about 14923.9994974538. Note that the first 3 decimals coincide. The cubic root of 222725761 is about 606.1640145029.

The spelling of 222725761 in words is "two hundred twenty-two million, seven hundred twenty-five thousand, seven hundred sixty-one".