217008763875 has 32 divisors (see below), whose sum is σ = 401225098560. Its totient is φ = 115738005600.

The previous prime is 217008763871. The next prime is 217008763897. The reversal of 217008763875 is 578367800712.

It is not a de Polignac number, because 217008763875 - 2² = 217008763871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (217008763871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32146072 + ... + 32152821.

It is an arithmetic number, because the mean of its divisors is an integer number (12538284330).

Almost surely, 2^217008763875 is an apocalyptic number.

217008763875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

217008763875 is a deficient number, since it is larger than the sum of its proper divisors (184216334685).

217008763875 is an equidigital number, since it uses as much as digits as its factorization.

217008763875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64298917 (or 64298901 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 54.

The spelling of 217008763875 in words is "two hundred seventeen billion, eight million, seven hundred sixty-three thousand, eight hundred seventy-five".