2145431141 has 6 divisors (see below), whose sum is σ = 2495705670. Its totient is φ = 1838940936.

The previous prime is 2145431129. The next prime is 2145431153. The reversal of 2145431141 is 1411345412.

It is an interprime number because it is at equal distance from previous prime (2145431129) and next prime (2145431153).

It can be written as a sum of positive squares in only one way, i.e., 1271992225 + 873438916 = 35665^2 + 29554^2 .

It is not a de Polignac number, because 2145431141 - 2⁶ = 2145431077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2145431141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145431941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21892106 + ... + 21892203.

It is an arithmetic number, because the mean of its divisors is an integer number (415950945).

Almost surely, 2^2145431141 is an apocalyptic number.

It is an amenable number.

2145431141 is a deficient number, since it is larger than the sum of its proper divisors (350274529).

2145431141 is an equidigital number, since it uses as much as digits as its factorization.

2145431141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43784323 (or 43784316 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 2145431141 is about 46318.7990021330. The cubic root of 2145431141 is about 1289.7479909536.

Adding to 2145431141 its reverse (1411345412), we get a palindrome (3556776553).

The spelling of 2145431141 in words is "two billion, one hundred forty-five million, four hundred thirty-one thousand, one hundred forty-one".