222180764461 has 4 divisors (see below), whose sum is σ = 235250221212. Its totient is φ = 209111307712.

The previous prime is 222180764453. The next prime is 222180764473. The reversal of 222180764461 is 164467081222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 164467081222 = 2 ⋅82233540611.

It can be written as a sum of positive squares in 2 ways, for example, as 70115862436 + 152064902025 = 264794^2 + 389955^2 .

It is a cyclic number.

It is not a de Polignac number, because 222180764461 - 2³ = 222180764453 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 (222180764261) 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, 6534728350 + ... + 6534728383.

It is an arithmetic number, because the mean of its divisors is an integer number (58812555303).

Almost surely, 2^222180764461 is an apocalyptic number.

It is an amenable number.

222180764461 is a deficient number, since it is larger than the sum of its proper divisors (13069456751).

222180764461 is a wasteful number, since it uses less digits than its factorization.

222180764461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13069456750.

The product of its (nonzero) digits is 258048, while the sum is 43.

The spelling of 222180764461 in words is "two hundred twenty-two billion, one hundred eighty million, seven hundred sixty-four thousand, four hundred sixty-one".