217470015312 has 40 divisors (see below), whose sum is σ = 612870044640. Its totient is φ = 65900004480.

The previous prime is 217470015307. The next prime is 217470015313. The reversal of 217470015312 is 213510074712.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217470015313) 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, 205936987 + ... + 205938042.

It is an arithmetic number, because the mean of its divisors is an integer number (15321751116).

Almost surely, 2^217470015312 is an apocalyptic number.

217470015312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

217470015312 is an abundant number, since it is smaller than the sum of its proper divisors (395400029328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217470015312 is a wasteful number, since it uses less digits than its factorization.

217470015312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411875051 (or 411875045 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The spelling of 217470015312 in words is "two hundred seventeen billion, four hundred seventy million, fifteen thousand, three hundred twelve".