2145540222 has 24 divisors (see below), whose sum is σ = 5312766576. Its totient is φ = 613011456.

The previous prime is 2145540217. The next prime is 2145540227. The reversal of 2145540222 is 2220455412.

It is an interprime number because it is at equal distance from previous prime (2145540217) and next prime (2145540227).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145540227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8513923 + ... + 8514174.

It is an arithmetic number, because the mean of its divisors is an integer number (221365274).

Almost surely, 2^2145540222 is an apocalyptic number.

2145540222 is an abundant number, since it is smaller than the sum of its proper divisors (3167226354).

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

2145540222 is a wasteful number, since it uses less digits than its factorization.

2145540222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17028112 (or 17028109 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 2145540222 is about 46319.9764896313. The cubic root of 2145540222 is about 1289.7698489715.

Adding to 2145540222 its reverse (2220455412), we get a palindrome (4365995634).

It can be divided in two parts, 21455402 and 22, that added together give a square (21455424 = 4632²).

The spelling of 2145540222 in words is "two billion, one hundred forty-five million, five hundred forty thousand, two hundred twenty-two".