1822340561 has 4 divisors (see below), whose sum is σ = 1822430052. Its totient is φ = 1822251072.

The previous prime is 1822340557. The next prime is 1822340567. The reversal of 1822340561 is 1650432281.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 742889536 + 1079451025 = 27256^2 + 32855^2 .

It is a cyclic number.

It is not a de Polignac number, because 1822340561 - 2² = 1822340557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1822340567) 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, 2261 + ... + 60413.

It is an arithmetic number, because the mean of its divisors is an integer number (455607513).

Almost surely, 2^1822340561 is an apocalyptic number.

It is an amenable number.

1822340561 is a deficient number, since it is larger than the sum of its proper divisors (89491).

1822340561 is an equidigital number, since it uses as much as digits as its factorization.

1822340561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89490.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1822340561 is about 42688.8809996233. The cubic root of 1822340561 is about 1221.4523063441.

The spelling of 1822340561 in words is "one billion, eight hundred twenty-two million, three hundred forty thousand, five hundred sixty-one".