217012953 has 8 divisors (see below), whose sum is σ = 289887616. Its totient is φ = 144406800.

The previous prime is 217012949. The next prime is 217012967. The reversal of 217012953 is 359210712.

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

It is not a de Polignac number, because 217012953 - 2² = 217012949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 217012953.

It is not an unprimeable number, because it can be changed into a prime (217012553) 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, 65233 + ... + 68478.

It is an arithmetic number, because the mean of its divisors is an integer number (36235952).

Almost surely, 2^217012953 is an apocalyptic number.

It is an amenable number.

217012953 is a deficient number, since it is larger than the sum of its proper divisors (72874663).

217012953 is a wasteful number, since it uses less digits than its factorization.

217012953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134255.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 217012953 is about 14731.3595095633. The cubic root of 217012953 is about 600.9364570976.

The spelling of 217012953 in words is "two hundred seventeen million, twelve thousand, nine hundred fifty-three".