2551530 has 32 divisors (see below), whose sum is σ = 6485184. Its totient is φ = 640256.

The previous prime is 2551511. The next prime is 2551531. The reversal of 2551530 is 351552.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2551497 and 2551506.

It is not an unprimeable number, because it can be changed into a prime (2551531) 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, 1992 + ... + 3011.

It is an arithmetic number, because the mean of its divisors is an integer number (202662).

2^2551530 is an apocalyptic number.

2551530 is an abundant number, since it is smaller than the sum of its proper divisors (3933654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2551530 is a wasteful number, since it uses less digits than its factorization.

2551530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 2551530 is about 1597.3509320121. The cubic root of 2551530 is about 136.6470392859.

It can be divided in two parts, 2551 and 530, that added together give a triangular number (3081 = T₇₈).

The spelling of 2551530 in words is "two million, five hundred fifty-one thousand, five hundred thirty".