222765961 has 12 divisors (see below), whose sum is σ = 248880772. Its totient is φ = 199188000.

The previous prime is 222765911. The next prime is 222765989. The reversal of 222765961 is 169567222.

It can be written as a sum of positive squares in 2 ways, for example, as 44142736 + 178623225 = 6644^2 + 13365^2 .

It is not a de Polignac number, because 222765961 - 2⁹ = 222765449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222765901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7710 + ... + 22471.

Almost surely, 2^222765961 is an apocalyptic number.

It is an amenable number.

222765961 is a deficient number, since it is larger than the sum of its proper divisors (26114811).

222765961 is a wasteful number, since it uses less digits than its factorization.

222765961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30264 (or 30253 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 222765961 is about 14925.3462606400. The cubic root of 222765961 is about 606.2004813630.

The spelling of 222765961 in words is "two hundred twenty-two million, seven hundred sixty-five thousand, nine hundred sixty-one".