2156467249 has 2 divisors, whose sum is σ = 2156467250. Its totient is φ = 2156467248.

The previous prime is 2156467223. The next prime is 2156467259. The reversal of 2156467249 is 9427646512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1954258849 + 202208400 = 44207^2 + 14220^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156467249 - 2⁵ = 2156467217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2156467199 and 2156467208.

It is not a weakly prime, because it can be changed into another prime (2156467219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078233624 + 1078233625.

It is an arithmetic number, because the mean of its divisors is an integer number (1078233625).

Almost surely, 2^2156467249 is an apocalyptic number.

It is an amenable number.

2156467249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156467249 is an equidigital number, since it uses as much as digits as its factorization.

2156467249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 46.

The square root of 2156467249 is about 46437.7782521946. The cubic root of 2156467249 is about 1291.9556997162.

The spelling of 2156467249 in words is "two billion, one hundred fifty-six million, four hundred sixty-seven thousand, two hundred forty-nine".