2157788299 has 2 divisors, whose sum is σ = 2157788300. Its totient is φ = 2157788298.

The previous prime is 2157788273. The next prime is 2157788327. The reversal of 2157788299 is 9928877512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2157788299 - 2¹⁵ = 2157755531 is a prime.

It is not a weakly prime, because it can be changed into another prime (2157788209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078894149 + 1078894150.

It is an arithmetic number, because the mean of its divisors is an integer number (1078894150).

Almost surely, 2^2157788299 is an apocalyptic number.

2157788299 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157788299 is an equidigital number, since it uses as much as digits as its factorization.

2157788299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 58.

The square root of 2157788299 is about 46451.9999461810. Note that the first 4 decimals coincide. The cubic root of 2157788299 is about 1292.2194628503.

The spelling of 2157788299 in words is "two billion, one hundred fifty-seven million, seven hundred eighty-eight thousand, two hundred ninety-nine".