2145501111 has 16 divisors (see below), whose sum is σ = 3214665216. Its totient is φ = 1262903136.

The previous prime is 2145501097. The next prime is 2145501119. The reversal of 2145501111 is 1111055412.

It is not a de Polignac number, because 2145501111 - 2⁷ = 2145500983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145501119) 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, 1195035 + ... + 1196828.

It is an arithmetic number, because the mean of its divisors is an integer number (200916576).

Almost surely, 2^2145501111 is an apocalyptic number.

2145501111 is a deficient number, since it is larger than the sum of its proper divisors (1069164105).

2145501111 is a wasteful number, since it uses less digits than its factorization.

2145501111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391902.

The product of its (nonzero) digits is 200, while the sum is 21.

The square root of 2145501111 is about 46319.5543048506. The cubic root of 2145501111 is about 1289.7620118629.

Adding to 2145501111 its reverse (1111055412), we get a palindrome (3256556523).

The spelling of 2145501111 in words is "two billion, one hundred forty-five million, five hundred one thousand, one hundred eleven".