217144142 has 8 divisors (see below), whose sum is σ = 328941432. Its totient is φ = 107497000.

The previous prime is 217144139. The next prime is 217144153. The reversal of 217144142 is 241441712.

217144142 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537284 + ... + 537687.

It is an arithmetic number, because the mean of its divisors is an integer number (41117679).

Almost surely, 2^217144142 is an apocalyptic number.

217144142 is a deficient number, since it is larger than the sum of its proper divisors (111797290).

217144142 is a wasteful number, since it uses less digits than its factorization.

217144142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075074.

The product of its digits is 1792, while the sum is 26.

The square root of 217144142 is about 14735.8115487407. The cubic root of 217144142 is about 601.0575257113.

Adding to 217144142 its reverse (241441712), we get a palindrome (458585854).

The spelling of 217144142 in words is "two hundred seventeen million, one hundred forty-four thousand, one hundred forty-two".