2855866251 has 16 divisors (see below), whose sum is σ = 4373892864. Its totient is φ = 1623637344.

The previous prime is 2855866249. The next prime is 2855866253. The reversal of 2855866251 is 1526685582.

2855866251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2855866249) and next prime (2855866253).

It is not a de Polignac number, because 2855866251 - 2¹ = 2855866249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2855866251.

It is not an unprimeable number, because it can be changed into a prime (2855866253) 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, 341025 + ... + 349298.

It is an arithmetic number, because the mean of its divisors is an integer number (273368304).

Almost surely, 2^2855866251 is an apocalyptic number.

2855866251 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2855866251 is a deficient number, since it is larger than the sum of its proper divisors (1518026613).

2855866251 is a wasteful number, since it uses less digits than its factorization.

2855866251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690530.

The product of its digits is 1152000, while the sum is 48.

The square root of 2855866251 is about 53440.3054912675. The cubic root of 2855866251 is about 1418.7720408098.

The spelling of 2855866251 in words is "two billion, eight hundred fifty-five million, eight hundred sixty-six thousand, two hundred fifty-one".