2165628931 has 2 divisors, whose sum is σ = 2165628932. Its totient is φ = 2165628930.

The previous prime is 2165628851. The next prime is 2165628953. The reversal of 2165628931 is 1398265612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2165628931 - 2¹⁵ = 2165596163 is a prime.

It is a super-2 number, since 2×2165628931² = 9379897333568405522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2165628991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082814465 + 1082814466.

It is an arithmetic number, because the mean of its divisors is an integer number (1082814466).

Almost surely, 2^2165628931 is an apocalyptic number.

2165628931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165628931 is an equidigital number, since it uses as much as digits as its factorization.

2165628931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 2165628931 is about 46536.3184083142. The cubic root of 2165628931 is about 1293.7827255960.

The spelling of 2165628931 in words is "two billion, one hundred sixty-five million, six hundred twenty-eight thousand, nine hundred thirty-one".