2551994 has 8 divisors (see below), whose sum is σ = 3835188. Its totient is φ = 1273600.

The previous prime is 2551987. The next prime is 2551999. The reversal of 2551994 is 4991552.

It can be written as a sum of positive squares in 2 ways, for example, as 2235025 + 316969 = 1495^2 + 563^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2551999) 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, 794 + ... + 2394.

2^2551994 is an apocalyptic number.

2551994 is a deficient number, since it is larger than the sum of its proper divisors (1283194).

2551994 is a wasteful number, since it uses less digits than its factorization.

2551994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400.

The product of its digits is 16200, while the sum is 35.

The square root of 2551994 is about 1597.4961658796. The cubic root of 2551994 is about 136.6553219481.

The spelling of 2551994 in words is "two million, five hundred fifty-one thousand, nine hundred ninety-four".