2542221131 has 4 divisors (see below), whose sum is σ = 2577046152. Its totient is φ = 2507396112.

The previous prime is 2542221047. The next prime is 2542221137. The reversal of 2542221131 is 1311222452.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2542221131 is a prime.

It is a super-2 number, since 2×2542221131² = 12925776557805838322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2542221097 and 2542221106.

It is not an unprimeable number, because it can be changed into a prime (2542221137) 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, 17412401 + ... + 17412546.

It is an arithmetic number, because the mean of its divisors is an integer number (644261538).

Almost surely, 2^2542221131 is an apocalyptic number.

2542221131 is a deficient number, since it is larger than the sum of its proper divisors (34825021).

2542221131 is an equidigital number, since it uses as much as digits as its factorization.

2542221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34825020.

The product of its digits is 960, while the sum is 23.

The square root of 2542221131 is about 50420.4435819440. The cubic root of 2542221131 is about 1364.8065813862.

Adding to 2542221131 its reverse (1311222452), we get a palindrome (3853443583).

The spelling of 2542221131 in words is "two billion, five hundred forty-two million, two hundred twenty-one thousand, one hundred thirty-one".