2551540442 has 16 divisors (see below), whose sum is σ = 4193488800. Its totient is φ = 1154724240.

The previous prime is 2551540429. The next prime is 2551540447. The reversal of 2551540442 is 2440451552.

It is a junction number, because it is equal to n+sod(n) for n = 2551540399 and 2551540408.

It is not an unprimeable number, because it can be changed into a prime (2551540447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248192 + ... + 258267.

It is an arithmetic number, because the mean of its divisors is an integer number (262093050).

Almost surely, 2^2551540442 is an apocalyptic number.

2551540442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2551540442 is a deficient number, since it is larger than the sum of its proper divisors (1641948358).

2551540442 is a wasteful number, since it uses less digits than its factorization.

2551540442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506701.

The product of its (nonzero) digits is 32000, while the sum is 32.

The square root of 2551540442 is about 50512.7750376081. The cubic root of 2551540442 is about 1366.4722569256.

Adding to 2551540442 its reverse (2440451552), we get a palindrome (4991991994).

The spelling of 2551540442 in words is "two billion, five hundred fifty-one million, five hundred forty thousand, four hundred forty-two".