2142145445 has 16 divisors (see below), whose sum is σ = 2808838080. Its totient is φ = 1555382400.

The previous prime is 2142145441. The next prime is 2142145459. The reversal of 2142145445 is 5445412412.

It is not a de Polignac number, because 2142145445 - 2² = 2142145441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142145441) 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, 2585 + ... + 65505.

It is an arithmetic number, because the mean of its divisors is an integer number (175552380).

Almost surely, 2^2142145445 is an apocalyptic number.

It is an amenable number.

2142145445 is a deficient number, since it is larger than the sum of its proper divisors (666692635).

2142145445 is a wasteful number, since it uses less digits than its factorization.

2142145445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63556.

The product of its digits is 25600, while the sum is 32.

The square root of 2142145445 is about 46283.3171347949. The cubic root of 2142145445 is about 1289.0892445737.

Adding to 2142145445 its reverse (5445412412), we get a palindrome (7587557857).

It can be divided in two parts, 21421 and 45445, that added together give a palindrome (66866).

The spelling of 2142145445 in words is "two billion, one hundred forty-two million, one hundred forty-five thousand, four hundred forty-five".