2542045221 has 16 divisors (see below), whose sum is σ = 3773560000. Its totient is φ = 1691291664.

The previous prime is 2542045213. The next prime is 2542045237. The reversal of 2542045221 is 1225402452.

It is not a de Polignac number, because 2542045221 - 2³ = 2542045213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2542045211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80866 + ... + 107811.

It is an arithmetic number, because the mean of its divisors is an integer number (235847500).

Almost surely, 2^2542045221 is an apocalyptic number.

It is an amenable number.

2542045221 is a deficient number, since it is larger than the sum of its proper divisors (1231514779).

2542045221 is a wasteful number, since it uses less digits than its factorization.

2542045221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189185 (or 189179 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 2542045221 is about 50418.6991204652. The cubic root of 2542045221 is about 1364.7751012158.

Adding to 2542045221 its reverse (1225402452), we get a palindrome (3767447673).

The spelling of 2542045221 in words is "two billion, five hundred forty-two million, forty-five thousand, two hundred twenty-one".