2469378221 has 4 divisors (see below), whose sum is σ = 2488822272. Its totient is φ = 2449934172.

The previous prime is 2469378203. The next prime is 2469378251. The reversal of 2469378221 is 1228739642.

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 2469378221 - 2¹⁸ = 2469116077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2469378251) 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, 9721835 + ... + 9722088.

It is an arithmetic number, because the mean of its divisors is an integer number (622205568).

Almost surely, 2^2469378221 is an apocalyptic number.

It is an amenable number.

2469378221 is a deficient number, since it is larger than the sum of its proper divisors (19444051).

2469378221 is a wasteful number, since it uses less digits than its factorization.

2469378221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19444050.

The product of its digits is 290304, while the sum is 44.

The square root of 2469378221 is about 49692.8387295393. The cubic root of 2469378221 is about 1351.6446751674.

The spelling of 2469378221 in words is "two billion, four hundred sixty-nine million, three hundred seventy-eight thousand, two hundred twenty-one".