2485811921 has 4 divisors (see below), whose sum is σ = 2503695600. Its totient is φ = 2467928244.

The previous prime is 2485811869. The next prime is 2485811941. The reversal of 2485811921 is 1291185842.

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 a de Polignac number, because none of the positive numbers 2^k-2485811921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2485811941) 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, 8941631 + ... + 8941908.

It is an arithmetic number, because the mean of its divisors is an integer number (625923900).

Almost surely, 2^2485811921 is an apocalyptic number.

It is an amenable number.

2485811921 is a deficient number, since it is larger than the sum of its proper divisors (17883679).

2485811921 is a wasteful number, since it uses less digits than its factorization.

2485811921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17883678.

The product of its digits is 46080, while the sum is 41.

The square root of 2485811921 is about 49857.9173351635. The cubic root of 2485811921 is about 1354.6364444504.

The spelling of 2485811921 in words is "two billion, four hundred eighty-five million, eight hundred eleven thousand, nine hundred twenty-one".