2551138 has 4 divisors (see below), whose sum is σ = 3826710. Its totient is φ = 1275568.

The previous prime is 2551127. The next prime is 2551169. The reversal of 2551138 is 8311552.

It is a happy number.

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., 2550409 + 729 = 1597^2 + 27^2 .

It is a super-3 number, since 3×2551138³ = 49810753330681080216, which contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637783 + ... + 637786.

2^2551138 is an apocalyptic number.

2551138 is a deficient number, since it is larger than the sum of its proper divisors (1275572).

2551138 is a wasteful number, since it uses less digits than its factorization.

2551138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275571.

The product of its digits is 1200, while the sum is 25.

The square root of 2551138 is about 1597.2282241433. The cubic root of 2551138 is about 136.6400410819.

The spelling of 2551138 in words is "two million, five hundred fifty-one thousand, one hundred thirty-eight".