2156867529 has 16 divisors (see below), whose sum is σ = 2973393600. Its totient is φ = 1389648960.

The previous prime is 2156867519. The next prime is 2156867533. The reversal of 2156867529 is 9257686512.

It is not a de Polignac number, because 2156867529 - 2⁵ = 2156867497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2156867509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48667 + ... + 81744.

It is an arithmetic number, because the mean of its divisors is an integer number (185837100).

Almost surely, 2^2156867529 is an apocalyptic number.

It is an amenable number.

2156867529 is a deficient number, since it is larger than the sum of its proper divisors (816526071).

2156867529 is a wasteful number, since it uses less digits than its factorization.

2156867529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130600.

The product of its digits is 1814400, while the sum is 51.

The square root of 2156867529 is about 46442.0879052611. The cubic root of 2156867529 is about 1292.0356316874.

The spelling of 2156867529 in words is "two billion, one hundred fifty-six million, eight hundred sixty-seven thousand, five hundred twenty-nine".