2566531803 has 16 divisors (see below), whose sum is σ = 3952734336. Its totient is φ = 1463975040.

The previous prime is 2566531763. The next prime is 2566531829. The reversal of 2566531803 is 3081356652.

It is not a de Polignac number, because 2566531803 - 2¹² = 2566527707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2566531103) 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, 2286901 + ... + 2288022.

It is an arithmetic number, because the mean of its divisors is an integer number (247045896).

Almost surely, 2^2566531803 is an apocalyptic number.

2566531803 is a deficient number, since it is larger than the sum of its proper divisors (1386202533).

2566531803 is a wasteful number, since it uses less digits than its factorization.

2566531803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4574954.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 2566531803 is about 50660.9494877465. The cubic root of 2566531803 is about 1369.1432302672.

The spelling of 2566531803 in words is "two billion, five hundred sixty-six million, five hundred thirty-one thousand, eight hundred three".