2154431212 has 12 divisors (see below), whose sum is σ = 3773918736. Its totient is φ = 1076168720.

The previous prime is 2154431143. The next prime is 2154431239. The reversal of 2154431212 is 2121344512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257083 + ... + 265330.

It is an arithmetic number, because the mean of its divisors is an integer number (314493228).

Almost surely, 2^2154431212 is an apocalyptic number.

It is an amenable number.

2154431212 is a deficient number, since it is larger than the sum of its proper divisors (1619487524).

2154431212 is a wasteful number, since it uses less digits than its factorization.

2154431212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523448 (or 523446 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 2154431212 is about 46415.8508701500. The cubic root of 2154431212 is about 1291.5489700061.

Adding to 2154431212 its reverse (2121344512), we get a palindrome (4275775724).

The spelling of 2154431212 in words is "two billion, one hundred fifty-four million, four hundred thirty-one thousand, two hundred twelve".