2851563 has 48 divisors (see below), whose sum is σ = 4951296. Its totient is φ = 1436160.

The previous prime is 2851561. The next prime is 2851571. The reversal of 2851563 is 3651582.

It is not a de Polignac number, because 2851563 - 2¹ = 2851561 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2851563.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2851561) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123970 + ... + 123992.

It is an arithmetic number, because the mean of its divisors is an integer number (103152).

2^2851563 is an apocalyptic number.

2851563 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2851563 is a deficient number, since it is larger than the sum of its proper divisors (2099733).

2851563 is a wasteful number, since it uses less digits than its factorization.

2851563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 67 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 2851563 is about 1688.6571588099. The cubic root of 2851563 is about 141.8059075430.

The spelling of 2851563 in words is "two million, eight hundred fifty-one thousand, five hundred sixty-three".