2551123742 has 4 divisors (see below), whose sum is σ = 3826685616. Its totient is φ = 1275561870.

The previous prime is 2551123739. The next prime is 2551123747. The reversal of 2551123742 is 2473211552.

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

It is a junction number, because it is equal to n+sod(n) for n = 2551123699 and 2551123708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551123747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637780934 + ... + 637780937.

It is an arithmetic number, because the mean of its divisors is an integer number (956671404).

Almost surely, 2^2551123742 is an apocalyptic number.

2551123742 is a deficient number, since it is larger than the sum of its proper divisors (1275561874).

2551123742 is a wasteful number, since it uses less digits than its factorization.

2551123742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275561873.

The product of its digits is 16800, while the sum is 32.

The square root of 2551123742 is about 50508.6501700451. The cubic root of 2551123742 is about 1366.3978652653.

The spelling of 2551123742 in words is "two billion, five hundred fifty-one million, one hundred twenty-three thousand, seven hundred forty-two".