217713051 has 12 divisors (see below), whose sum is σ = 318904560. Its totient is φ = 143097360.

The previous prime is 217713047. The next prime is 217713053. The reversal of 217713051 is 150317712.

It is a happy number.

It is not a de Polignac number, because 217713051 - 2² = 217713047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (217713053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169716 + ... + 170993.

It is an arithmetic number, because the mean of its divisors is an integer number (26575380).

Almost surely, 2^217713051 is an apocalyptic number.

217713051 is a deficient number, since it is larger than the sum of its proper divisors (101191509).

217713051 is a wasteful number, since it uses less digits than its factorization.

217713051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340786 (or 340783 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 217713051 is about 14755.1025411550. The cubic root of 217713051 is about 601.5819835475.

The spelling of 217713051 in words is "two hundred seventeen million, seven hundred thirteen thousand, fifty-one".