2551005442 has 4 divisors (see below), whose sum is σ = 3826508166. Its totient is φ = 1275502720.

The previous prime is 2551005437. The next prime is 2551005449. The reversal of 2551005442 is 2445001552.

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., 2482132041 + 68873401 = 49821^2 + 8299^2 .

It is a super-2 number, since 2×2551005442² = 13015257530227230728, 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 2551005442.

It is not an unprimeable number, because it can be changed into a prime (2551005449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637751359 + ... + 637751362.

Almost surely, 2^2551005442 is an apocalyptic number.

2551005442 is a deficient number, since it is larger than the sum of its proper divisors (1275502724).

2551005442 is a wasteful number, since it uses less digits than its factorization.

2551005442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275502723.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 2551005442 is about 50507.4790699358. The cubic root of 2551005442 is about 1366.3767441983.

Adding to 2551005442 its reverse (2445001552), we get a palindrome (4996006994).

The spelling of 2551005442 in words is "two billion, five hundred fifty-one million, five thousand, four hundred forty-two".