2143245155 has 4 divisors (see below), whose sum is σ = 2571894192. Its totient is φ = 1714596120.

The previous prime is 2143245113. The next prime is 2143245157. The reversal of 2143245155 is 5515423412.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2143245155 - 2²⁴ = 2126467939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143245157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214324511 + ... + 214324520.

It is an arithmetic number, because the mean of its divisors is an integer number (642973548).

Almost surely, 2^2143245155 is an apocalyptic number.

2143245155 is a deficient number, since it is larger than the sum of its proper divisors (428649037).

2143245155 is an equidigital number, since it uses as much as digits as its factorization.

2143245155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428649036.

The product of its digits is 24000, while the sum is 32.

The square root of 2143245155 is about 46295.1958090686. The cubic root of 2143245155 is about 1289.3097994412.

Adding to 2143245155 its reverse (5515423412), we get a palindrome (7658668567).

The spelling of 2143245155 in words is "two billion, one hundred forty-three million, two hundred forty-five thousand, one hundred fifty-five".