2151222255 has 192 divisors, whose sum is σ = 4780339200. Its totient is φ = 889056000.

The previous prime is 2151222239. The next prime is 2151222287. The reversal of 2151222255 is 5522221512.

It is a happy number.

It is not a de Polignac number, because 2151222255 - 2⁴ = 2151222239 is a prime.

Its product of digits (4000) is a multiple of the sum of its prime divisors (250).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 14246430 + ... + 14246580.

It is an arithmetic number, because the mean of its divisors is an integer number (24897600).

Almost surely, 2^2151222255 is an apocalyptic number.

2151222255 is an abundant number, since it is smaller than the sum of its proper divisors (2629116945).

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

2151222255 is a wasteful number, since it uses less digits than its factorization.

2151222255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 250 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 2151222255 is about 46381.2705194672. The cubic root of 2151222255 is about 1290.9074109560.

Adding to 2151222255 its reverse (5522221512), we get a palindrome (7673443767).

The spelling of 2151222255 in words is "two billion, one hundred fifty-one million, two hundred twenty-two thousand, two hundred fifty-five".