2157902323 has 2 divisors, whose sum is σ = 2157902324. Its totient is φ = 2157902322.

The previous prime is 2157902273. The next prime is 2157902363. The reversal of 2157902323 is 3232097512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2157902323 is a prime.

It is not a weakly prime, because it can be changed into another prime (2157902363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078951161 + 1078951162.

It is an arithmetic number, because the mean of its divisors is an integer number (1078951162).

Almost surely, 2^2157902323 is an apocalyptic number.

2157902323 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157902323 is an equidigital number, since it uses as much as digits as its factorization.

2157902323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 2157902323 is about 46453.2272614078. The cubic root of 2157902323 is about 1292.2422240323.

Adding to 2157902323 its reverse (3232097512), we get a palindrome (5389999835).

The spelling of 2157902323 in words is "two billion, one hundred fifty-seven million, nine hundred two thousand, three hundred twenty-three".