2115420445 has 16 divisors (see below), whose sum is σ = 2555908992. Its totient is φ = 1680775360.

The previous prime is 2115420421. The next prime is 2115420451. The reversal of 2115420445 is 5440245112.

It is not a de Polignac number, because 2115420445 - 2⁷ = 2115420317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453294 + ... + 457936.

It is an arithmetic number, because the mean of its divisors is an integer number (159744312).

Almost surely, 2^2115420445 is an apocalyptic number.

It is an amenable number.

2115420445 is a deficient number, since it is larger than the sum of its proper divisors (440488547).

2115420445 is a wasteful number, since it uses less digits than its factorization.

2115420445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 2115420445 is about 45993.7000577253. The cubic root of 2115420445 is about 1283.7059843571.

Adding to 2115420445 its reverse (5440245112), we get a palindrome (7555665557).

The spelling of 2115420445 in words is "two billion, one hundred fifteen million, four hundred twenty thousand, four hundred forty-five".