2145431858 has 32 divisors (see below), whose sum is σ = 3579344640. Its totient is φ = 959270400.

The previous prime is 2145431843. The next prime is 2145431863. The reversal of 2145431858 is 8581345412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108998 + ... + 127166.

It is an arithmetic number, because the mean of its divisors is an integer number (111854520).

Almost surely, 2^2145431858 is an apocalyptic number.

2145431858 is a deficient number, since it is larger than the sum of its proper divisors (1433912782).

2145431858 is a wasteful number, since it uses less digits than its factorization.

2145431858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18362.

The product of its digits is 153600, while the sum is 41.

The square root of 2145431858 is about 46318.8067419704. The cubic root of 2145431858 is about 1289.7481346309.

The spelling of 2145431858 in words is "two billion, one hundred forty-five million, four hundred thirty-one thousand, eight hundred fifty-eight".