2551091001 has 4 divisors (see below), whose sum is σ = 3401454672. Its totient is φ = 1700727332.

The previous prime is 2551090991. The next prime is 2551091017. The reversal of 2551091001 is 1001901552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2551091001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2551091041) 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, 425181831 + ... + 425181836.

It is an arithmetic number, because the mean of its divisors is an integer number (850363668).

Almost surely, 2^2551091001 is an apocalyptic number.

It is an amenable number.

2551091001 is a deficient number, since it is larger than the sum of its proper divisors (850363671).

2551091001 is an equidigital number, since it uses as much as digits as its factorization.

2551091001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850363670.

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 2551091001 is about 50508.3260562058. The cubic root of 2551091001 is about 1366.3920198120.

Adding to 2551091001 its reverse (1001901552), we get a palindrome (3552992553).

The spelling of 2551091001 in words is "two billion, five hundred fifty-one million, ninety-one thousand, one".