217057932 has 144 divisors (see below), whose sum is σ = 687348480. Its totient is φ = 56225664.

The previous prime is 217057927. The next prime is 217057963. The reversal of 217057932 is 239750712.

It is a super-2 number, since 2×217057932² = 94228291688233248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 192723 + ... + 193845.

Almost surely, 2^217057932 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 217057932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343674240).

217057932 is an abundant number, since it is smaller than the sum of its proper divisors (470290548).

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

217057932 is a wasteful number, since it uses less digits than its factorization.

217057932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212 (or 1207 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 217057932 is about 14732.8860716426. The cubic root of 217057932 is about 600.9779717527.

The spelling of 217057932 in words is "two hundred seventeen million, fifty-seven thousand, nine hundred thirty-two".