47217142 has 8 divisors (see below), whose sum is σ = 80943696. Its totient is φ = 20235912.

The previous prime is 47217103. The next prime is 47217151. The reversal of 47217142 is 24171274.

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

It is a self number, because there is not a number n which added to its sum of digits gives 47217142.

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, 1686313 + ... + 1686340.

It is an arithmetic number, because the mean of its divisors is an integer number (10117962).

Almost surely, 2^47217142 is an apocalyptic number.

47217142 is a deficient number, since it is larger than the sum of its proper divisors (33726554).

47217142 is a wasteful number, since it uses less digits than its factorization.

47217142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3372662.

The product of its digits is 3136, while the sum is 28.

The square root of 47217142 is about 6871.4730589590. The cubic root of 47217142 is about 361.4375186542.

The spelling of 47217142 in words is "forty-seven million, two hundred seventeen thousand, one hundred forty-two".