2421181865 has 16 divisors (see below), whose sum is σ = 2990832768. Its totient is φ = 1880543616.

The previous prime is 2421181859. The next prime is 2421181891. The reversal of 2421181865 is 5681811242.

It is a cyclic number.

It is not a de Polignac number, because 2421181865 - 2¹⁶ = 2421116329 is a prime.

It is a Duffinian 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, 2189 + ... + 69621.

It is an arithmetic number, because the mean of its divisors is an integer number (186927048).

Almost surely, 2^2421181865 is an apocalyptic number.

It is an amenable number.

2421181865 is a deficient number, since it is larger than the sum of its proper divisors (569650903).

2421181865 is a wasteful number, since it uses less digits than its factorization.

2421181865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67648.

The product of its digits is 30720, while the sum is 38.

The square root of 2421181865 is about 49205.5064499899. The cubic root of 2421181865 is about 1342.7932128563.

The spelling of 2421181865 in words is "two billion, four hundred twenty-one million, one hundred eighty-one thousand, eight hundred sixty-five".