216190257 has 8 divisors (see below), whose sum is σ = 288453984. Its totient is φ = 144026688.

The previous prime is 216190231. The next prime is 216190267. The reversal of 216190257 is 752091612.

216190257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 216190257 - 2⁶ = 216190193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216190267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19848 + ... + 28745.

It is an arithmetic number, because the mean of its divisors is an integer number (36056748).

Almost surely, 2^216190257 is an apocalyptic number.

It is an amenable number.

216190257 is a deficient number, since it is larger than the sum of its proper divisors (72263727).

216190257 is a wasteful number, since it uses less digits than its factorization.

216190257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50079.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 216190257 is about 14703.4097065953. The cubic root of 216190257 is about 600.1761121913.

The spelling of 216190257 in words is "two hundred sixteen million, one hundred ninety thousand, two hundred fifty-seven".