2564550 has 72 divisors (see below), whose sum is σ = 7108920. Its totient is φ = 662400.

The previous prime is 2564539. The next prime is 2564561. The reversal of 2564550 is 554652.

It is an interprime number because it is at equal distance from previous prime (2564539) and next prime (2564561).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18381 + ... + 18519.

It is an arithmetic number, because the mean of its divisors is an integer number (98735).

2^2564550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2564550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3554460).

2564550 is an abundant number, since it is smaller than the sum of its proper divisors (4544370).

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

2564550 is a wasteful number, since it uses less digits than its factorization.

2564550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 2564550 is about 1601.4212437707. The cubic root of 2564550 is about 136.8790735011.

The spelling of 2564550 in words is "two million, five hundred sixty-four thousand, five hundred fifty".