1822322261 has 4 divisors (see below), whose sum is σ = 1871574252. Its totient is φ = 1773070272.

The previous prime is 1822322207. The next prime is 1822322273. The reversal of 1822322261 is 1622232281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1354681636 + 467640625 = 36806^2 + 21625^2 .

It is a cyclic number.

It is not a de Polignac number, because 1822322261 - 2¹⁸ = 1822060117 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 (1822324261) 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, 24625940 + ... + 24626013.

It is an arithmetic number, because the mean of its divisors is an integer number (467893563).

Almost surely, 2^1822322261 is an apocalyptic number.

It is an amenable number.

1822322261 is a deficient number, since it is larger than the sum of its proper divisors (49251991).

1822322261 is an equidigital number, since it uses as much as digits as its factorization.

1822322261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49251990.

The product of its digits is 4608, while the sum is 29.

The square root of 1822322261 is about 42688.6666575568. Note that the first 4 decimals coincide. The cubic root of 1822322261 is about 1221.4482177099.

The spelling of 1822322261 in words is "one billion, eight hundred twenty-two million, three hundred twenty-two thousand, two hundred sixty-one".