217484542 has 16 divisors (see below), whose sum is σ = 356346864. Its totient is φ = 98728000.

The previous prime is 217484467. The next prime is 217484569. The reversal of 217484542 is 245484712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12042 + ... + 24082.

It is an arithmetic number, because the mean of its divisors is an integer number (22271679).

Almost surely, 2^217484542 is an apocalyptic number.

217484542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

217484542 is a deficient number, since it is larger than the sum of its proper divisors (138862322).

217484542 is a wasteful number, since it uses less digits than its factorization.

217484542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12875.

The product of its digits is 71680, while the sum is 37.

The square root of 217484542 is about 14747.3571191587. The cubic root of 217484542 is about 601.3714387969.

The spelling of 217484542 in words is "two hundred seventeen million, four hundred eighty-four thousand, five hundred forty-two".