217125542 has 16 divisors (see below), whose sum is σ = 328007232. Its totient is φ = 107793000.

The previous prime is 217125539. The next prime is 217125613. The reversal of 217125542 is 245521712.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262133 + ... + 262959.

It is an arithmetic number, because the mean of its divisors is an integer number (20500452).

Almost surely, 2^217125542 is an apocalyptic number.

217125542 is a deficient number, since it is larger than the sum of its proper divisors (110881690).

217125542 is a wasteful number, since it uses less digits than its factorization.

217125542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603.

The product of its digits is 5600, while the sum is 29.

The square root of 217125542 is about 14735.1804196623. The cubic root of 217125542 is about 601.0403635487.

The spelling of 217125542 in words is "two hundred seventeen million, one hundred twenty-five thousand, five hundred forty-two".