2551001042 has 4 divisors (see below), whose sum is σ = 3826501566. Its totient is φ = 1275500520.

The previous prime is 2551001041. The next prime is 2551001051. The reversal of 2551001042 is 2401001552.

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., 2083100881 + 467900161 = 45641^2 + 21631^2 .

It is not an unprimeable number, because it can be changed into a prime (2551001041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637750259 + ... + 637750262.

Almost surely, 2^2551001042 is an apocalyptic number.

2551001042 is a deficient number, since it is larger than the sum of its proper divisors (1275500524).

2551001042 is a wasteful number, since it uses less digits than its factorization.

2551001042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275500523.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2551001042 is about 50507.4355120115. The cubic root of 2551001042 is about 1366.3759586177.

Adding to 2551001042 its reverse (2401001552), we get a palindrome (4952002594).

The spelling of 2551001042 in words is "two billion, five hundred fifty-one million, one thousand, forty-two".