217157058 has 16 divisors (see below), whose sum is σ = 482571360. Its totient is φ = 72385668.

The previous prime is 217157041. The next prime is 217157119. The reversal of 217157058 is 850751712.

217157058 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2010660 + ... + 2010767.

It is an arithmetic number, because the mean of its divisors is an integer number (30160710).

Almost surely, 2^217157058 is an apocalyptic number.

217157058 is an abundant number, since it is smaller than the sum of its proper divisors (265414302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217157058 is a wasteful number, since it uses less digits than its factorization.

217157058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021438 (or 4021432 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 36.

The square root of 217157058 is about 14736.2497942998. The cubic root of 217157058 is about 601.0694426880.

The spelling of 217157058 in words is "two hundred seventeen million, one hundred fifty-seven thousand, fifty-eight".