217429916 has 48 divisors (see below), whose sum is σ = 424677120. Its totient is φ = 96577920.

The previous prime is 217429897. The next prime is 217429931. The reversal of 217429916 is 619924712.

217429916 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446225 + ... + 446711.

It is an arithmetic number, because the mean of its divisors is an integer number (8847440).

Almost surely, 2^217429916 is an apocalyptic number.

It is an amenable number.

217429916 is a deficient number, since it is larger than the sum of its proper divisors (207247204).

217429916 is a wasteful number, since it uses less digits than its factorization.

217429916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 712 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 217429916 is about 14745.5049421849. The cubic root of 217429916 is about 601.3210853838.

The spelling of 217429916 in words is "two hundred seventeen million, four hundred twenty-nine thousand, nine hundred sixteen".