216431142 has 16 divisors (see below), whose sum is σ = 435769200. Its totient is φ = 71659232.

The previous prime is 216431129. The next prime is 216431143. The reversal of 216431142 is 241134612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216431143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120153 + ... + 121940.

It is an arithmetic number, because the mean of its divisors is an integer number (27235575).

Almost surely, 2^216431142 is an apocalyptic number.

216431142 is an abundant number, since it is smaller than the sum of its proper divisors (219338058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216431142 is a wasteful number, since it uses less digits than its factorization.

216431142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242247.

The product of its digits is 1152, while the sum is 24.

The square root of 216431142 is about 14711.5988933902. The cubic root of 216431142 is about 600.3989402412.

Adding to 216431142 its reverse (241134612), we get a palindrome (457565754).

The spelling of 216431142 in words is "two hundred sixteen million, four hundred thirty-one thousand, one hundred forty-two".