5091221905 has 32 divisors (see below), whose sum is σ = 7665603840. Its totient is φ = 3153496320.

The previous prime is 5091221881. The next prime is 5091221911.

5091221905 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5091221905 - 2⁷ = 5091221777 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18331 + ... + 102559.

It is an arithmetic number, because the mean of its divisors is an integer number (239550120).

Almost surely, 2^5091221905 is an apocalyptic number.

5091221905 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5091221905 is a deficient number, since it is larger than the sum of its proper divisors (2574381935).

5091221905 is a wasteful number, since it uses less digits than its factorization.

5091221905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84409.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 5091221905 is about 71352.7988589095. The cubic root of 5091221905 is about 1720.3124888565.

The spelling of 5091221905 in words is "five billion, ninety-one million, two hundred twenty-one thousand, nine hundred five".