2129260851 has 20 divisors (see below), whose sum is σ = 3221020000. Its totient is φ = 1401534576.

The previous prime is 2129260843. The next prime is 2129260883. The reversal of 2129260851 is 1580629212.

2129260851 is a `hidden beast` number, since 21 + 29 + 2 + 608 + 5 + 1 = 666.

It is not a de Polignac number, because 2129260851 - 2³ = 2129260843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2129260841) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 159976 + ... + 172773.

It is an arithmetic number, because the mean of its divisors is an integer number (161051000).

Almost surely, 2^2129260851 is an apocalyptic number.

2129260851 is a deficient number, since it is larger than the sum of its proper divisors (1091759149).

2129260851 is an equidigital number, since it uses as much as digits as its factorization.

2129260851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332840 (or 332831 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 2129260851 is about 46143.9145608606. The cubic root of 2129260851 is about 1286.4995038261.

The spelling of 2129260851 in words is "two billion, one hundred twenty-nine million, two hundred sixty thousand, eight hundred fifty-one".