2551001 has 4 divisors (see below), whose sum is σ = 2575872. Its totient is φ = 2526132.

The previous prime is 2550991. The next prime is 2551009. The reversal of 2551001 is 1001552.

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 not a de Polignac number, because 2551001 - 2⁶ = 2550937 is a prime.

It is a super-2 number, since 2×2551001² = 13015212204002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2551009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12281 + ... + 12486.

It is an arithmetic number, because the mean of its divisors is an integer number (643968).

2^2551001 is an apocalyptic number.

It is an amenable number.

2551001 is a deficient number, since it is larger than the sum of its proper divisors (24871).

2551001 is a wasteful number, since it uses less digits than its factorization.

2551001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24870.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 2551001 is about 1597.1853367722. The cubic root of 2551001 is about 136.6375951119.

Adding to 2551001 its reverse (1001552), we get a palindrome (3552553).

It can be divided in two parts, 255 and 1001, that multiplied together give a triangular number (255255 = T₇₁₄).

The spelling of 2551001 in words is "two million, five hundred fifty-one thousand, one".