2551558 has 4 divisors (see below), whose sum is σ = 3827340. Its totient is φ = 1275778.

The previous prime is 2551543. The next prime is 2551559. The reversal of 2551558 is 8551552.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637888 + ... + 637891.

It is an arithmetic number, because the mean of its divisors is an integer number (956835).

2^2551558 is an apocalyptic number.

2551558 is a deficient number, since it is larger than the sum of its proper divisors (1275782).

2551558 is a wasteful number, since it uses less digits than its factorization.

2551558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275781.

The product of its digits is 10000, while the sum is 31.

The square root of 2551558 is about 1597.3596964992. The cubic root of 2551558 is about 136.6475391302.

The spelling of 2551558 in words is "two million, five hundred fifty-one thousand, five hundred fifty-eight".