2542221869 has 16 divisors (see below), whose sum is σ = 2981422080. Its totient is φ = 2142880560.

The previous prime is 2542221859. The next prime is 2542221889. The reversal of 2542221869 is 9681222452.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2542221869 is a prime.

It is a super-2 number, since 2×2542221869² = 12925784062443706322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2542221859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119579 + ... + 139224.

It is an arithmetic number, because the mean of its divisors is an integer number (186338880).

Almost surely, 2^2542221869 is an apocalyptic number.

It is an amenable number.

2542221869 is a deficient number, since it is larger than the sum of its proper divisors (439200211).

2542221869 is a wasteful number, since it uses less digits than its factorization.

2542221869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258880.

The product of its digits is 138240, while the sum is 41.

The square root of 2542221869 is about 50420.4509004035. The cubic root of 2542221869 is about 1364.8067134528.

The spelling of 2542221869 in words is "two billion, five hundred forty-two million, two hundred twenty-one thousand, eight hundred sixty-nine".