216251142 has 8 divisors (see below), whose sum is σ = 432502296. Its totient is φ = 72083712.

The previous prime is 216251117. The next prime is 216251149. The reversal of 216251142 is 241152612.

It is a sphenic number, since it is the product of 3 distinct primes.

216251142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216251149) 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, 18020923 + ... + 18020934.

It is an arithmetic number, because the mean of its divisors is an integer number (54062787).

Almost surely, 2^216251142 is an apocalyptic number.

216251142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216251142 is a wasteful number, since it uses less digits than its factorization.

216251142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36041862.

The product of its digits is 960, while the sum is 24.

The square root of 216251142 is about 14705.4799989664. The cubic root of 216251142 is about 600.2324488232.

The spelling of 216251142 in words is "two hundred sixteen million, two hundred fifty-one thousand, one hundred forty-two".