216371142 has 64 divisors (see below), whose sum is σ = 520820160. Its totient is φ = 66189312.

The previous prime is 216371137. The next prime is 216371149. The reversal of 216371142 is 241173612.

216371142 is a `hidden beast` number, since 21 + 637 + 1 + 1 + 4 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216371149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134688 + ... + 136284.

It is an arithmetic number, because the mean of its divisors is an integer number (8137815).

Almost surely, 2^216371142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216371142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260410080).

216371142 is an abundant number, since it is smaller than the sum of its proper divisors (304449018).

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

216371142 is a wasteful number, since it uses less digits than its factorization.

216371142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814 (or 1808 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 216371142 is about 14709.5595447314. The cubic root of 216371142 is about 600.3434533621.

The spelling of 216371142 in words is "two hundred sixteen million, three hundred seventy-one thousand, one hundred forty-two".