217151045 has 16 divisors (see below), whose sum is σ = 267805440. Its totient is φ = 168951744.

The previous prime is 217151041. The next prime is 217151117. The reversal of 217151045 is 540151712.

It is a cyclic number.

It is not a de Polignac number, because 217151045 - 2² = 217151041 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217151041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35471 + ... + 41139.

It is an arithmetic number, because the mean of its divisors is an integer number (16737840).

Almost surely, 2^217151045 is an apocalyptic number.

It is an amenable number.

217151045 is a deficient number, since it is larger than the sum of its proper divisors (50654395).

217151045 is a wasteful number, since it uses less digits than its factorization.

217151045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5884.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 217151045 is about 14736.0457721873. The cubic root of 217151045 is about 601.0638948387.

The spelling of 217151045 in words is "two hundred seventeen million, one hundred fifty-one thousand, forty-five".