2157322361 has 2 divisors, whose sum is σ = 2157322362. Its totient is φ = 2157322360.

The previous prime is 2157322313. The next prime is 2157322367. The reversal of 2157322361 is 1632237512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2014663225 + 142659136 = 44885^2 + 11944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2157322361 is a prime.

It is a super-2 number, since 2×2157322361² = 9308079538541228642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2157322367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078661180 + 1078661181.

It is an arithmetic number, because the mean of its divisors is an integer number (1078661181).

Almost surely, 2^2157322361 is an apocalyptic number.

It is an amenable number.

2157322361 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157322361 is an equidigital number, since it uses as much as digits as its factorization.

2157322361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 2157322361 is about 46446.9844123383. The cubic root of 2157322361 is about 1292.1264451533.

Adding to 2157322361 its reverse (1632237512), we get a palindrome (3789559873).

It can be divided in two parts, 21573 and 22361, that added together give a palindrome (43934).

The spelling of 2157322361 in words is "two billion, one hundred fifty-seven million, three hundred twenty-two thousand, three hundred sixty-one".