2551630 has 32 divisors (see below), whose sum is σ = 4821120. Its totient is φ = 971520.

The previous prime is 2551607. The next prime is 2551639. The reversal of 2551630 is 361552.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28626 + ... + 28714.

It is an arithmetic number, because the mean of its divisors is an integer number (150660).

2^2551630 is an apocalyptic number.

2551630 is a deficient number, since it is larger than the sum of its proper divisors (2269490).

2551630 is a wasteful number, since it uses less digits than its factorization.

2551630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 2551630 is about 1597.3822335308. The cubic root of 2551630 is about 136.6488244273.

The spelling of 2551630 in words is "two million, five hundred fifty-one thousand, six hundred thirty".