216047057 has 4 divisors (see below), whose sum is σ = 216230256. Its totient is φ = 215863860.

The previous prime is 216047053. The next prime is 216047059. The reversal of 216047057 is 750740612.

216047057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216047057 - 2² = 216047053 is a prime.

It is a super-2 number, since 2×216047057² = 93352661676722498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216047053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89819 + ... + 92192.

It is an arithmetic number, because the mean of its divisors is an integer number (54057564).

Almost surely, 2^216047057 is an apocalyptic number.

It is an amenable number.

216047057 is a deficient number, since it is larger than the sum of its proper divisors (183199).

216047057 is a wasteful number, since it uses less digits than its factorization.

216047057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183198.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 216047057 is about 14698.5392811667. The cubic root of 216047057 is about 600.0435681326.

Adding to 216047057 its reverse (750740612), we get a palindrome (966787669).

The spelling of 216047057 in words is "two hundred sixteen million, forty-seven thousand, fifty-seven".