1822274921 has 2 divisors, whose sum is σ = 1822274922. Its totient is φ = 1822274920.

The previous prime is 1822274903. The next prime is 1822274957. The reversal of 1822274921 is 1294722281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1268143321 + 554131600 = 35611^2 + 23540^2 .

It is an emirp because it is prime and its reverse (1294722281) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1822274921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1822274821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 911137460 + 911137461.

It is an arithmetic number, because the mean of its divisors is an integer number (911137461).

Almost surely, 2^1822274921 is an apocalyptic number.

It is an amenable number.

1822274921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1822274921 is an equidigital number, since it uses as much as digits as its factorization.

1822274921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 1822274921 is about 42688.1121742342. The cubic root of 1822274921 is about 1221.4376407553.

The spelling of 1822274921 in words is "one billion, eight hundred twenty-two million, two hundred seventy-four thousand, nine hundred twenty-one".