2542221868 has 24 divisors (see below), whose sum is σ = 4485524400. Its totient is φ = 1260661248.

The previous prime is 2542221859. The next prime is 2542221889. The reversal of 2542221868 is 8681222452.

2542221868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2542221868² = 12925784052274818848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2542221868.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1165603 + ... + 1167781.

It is an arithmetic number, because the mean of its divisors is an integer number (186896850).

Almost surely, 2^2542221868 is an apocalyptic number.

It is an amenable number.

2542221868 is a deficient number, since it is larger than the sum of its proper divisors (1943302532).

2542221868 is a wasteful number, since it uses less digits than its factorization.

2542221868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4449 (or 4447 counting only the distinct ones).

The product of its digits is 122880, while the sum is 40.

The square root of 2542221868 is about 50420.4508904869. The cubic root of 2542221868 is about 1364.8067132739.

The spelling of 2542221868 in words is "two billion, five hundred forty-two million, two hundred twenty-one thousand, eight hundred sixty-eight".