216191045 has 16 divisors (see below), whose sum is σ = 301518720. Its totient is φ = 145731264.

The previous prime is 216190999. The next prime is 216191051. The reversal of 216191045 is 540191612.

It is not a de Polignac number, because 216191045 - 2⁸ = 216190789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216190999 and 216191017.

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, 50282 + ... + 54411.

It is an arithmetic number, because the mean of its divisors is an integer number (18844920).

Almost surely, 2^216191045 is an apocalyptic number.

It is an amenable number.

216191045 is a deficient number, since it is larger than the sum of its proper divisors (85327675).

216191045 is a wasteful number, since it uses less digits than its factorization.

216191045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104764.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 216191045 is about 14703.4365030764. The cubic root of 216191045 is about 600.1768413919.

The spelling of 216191045 in words is "two hundred sixteen million, one hundred ninety-one thousand, forty-five".