2115504401 has 4 divisors (see below), whose sum is σ = 2116465152. Its totient is φ = 2114543652.

The previous prime is 2115504379. The next prime is 2115504407. The reversal of 2115504401 is 1044055112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2115504401 - 2⁶ = 2115504337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115504407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477065 + ... + 481478.

It is an arithmetic number, because the mean of its divisors is an integer number (529116288).

Almost surely, 2^2115504401 is an apocalyptic number.

It is an amenable number.

2115504401 is a deficient number, since it is larger than the sum of its proper divisors (960751).

2115504401 is an equidigital number, since it uses as much as digits as its factorization.

2115504401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960750.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2115504401 is about 45994.6127388850. The cubic root of 2115504401 is about 1283.7229665436.

Adding to 2115504401 its reverse (1044055112), we get a palindrome (3159559513).

Subtracting from 2115504401 its reverse (1044055112), we obtain a square (1071449289 = 32733²).

The spelling of 2115504401 in words is "two billion, one hundred fifteen million, five hundred four thousand, four hundred one".