2157323297 has 2 divisors, whose sum is σ = 2157323298. Its totient is φ = 2157323296.

The previous prime is 2157323279. The next prime is 2157323323. The reversal of 2157323297 is 7923237512.

Together with previous prime (2157323279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2079724816 + 77598481 = 45604^2 + 8809^2 .

It is a cyclic number.

It is not a de Polignac number, because 2157323297 - 2⁸ = 2157323041 is a prime.

It is not a weakly prime, because it can be changed into another prime (2157323227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078661648 + 1078661649.

It is an arithmetic number, because the mean of its divisors is an integer number (1078661649).

Almost surely, 2^2157323297 is an apocalyptic number.

It is an amenable number.

2157323297 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157323297 is an equidigital number, since it uses as much as digits as its factorization.

2157323297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 41.

The square root of 2157323297 is about 46446.9944883412. The cubic root of 2157323297 is about 1292.1266320254.

The spelling of 2157323297 in words is "two billion, one hundred fifty-seven million, three hundred twenty-three thousand, two hundred ninety-seven".