2542581218 has 4 divisors (see below), whose sum is σ = 3813871830. Its totient is φ = 1271290608.

The previous prime is 2542581203. The next prime is 2542581221. The reversal of 2542581218 is 8121852452.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1881217129 + 661364089 = 43373^2 + 25717^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 635645303 + ... + 635645306.

Almost surely, 2^2542581218 is an apocalyptic number.

2542581218 is a deficient number, since it is larger than the sum of its proper divisors (1271290612).

2542581218 is a wasteful number, since it uses less digits than its factorization.

2542581218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271290611.

The product of its digits is 51200, while the sum is 38.

The square root of 2542581218 is about 50424.0142987446. The cubic root of 2542581218 is about 1364.8710166288.

The spelling of 2542581218 in words is "two billion, five hundred forty-two million, five hundred eighty-one thousand, two hundred eighteen".