217053316 has 12 divisors (see below), whose sum is σ = 380026332. Its totient is φ = 108474368.

The previous prime is 217053307. The next prime is 217053329. The reversal of 217053316 is 613350712.

It can be written as a sum of positive squares in 2 ways, for example, as 110880900 + 106172416 = 10530^2 + 10304^2 .

It is a super-2 number, since 2×217053316² = 94224283973191712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2845 + ... + 21028.

It is an arithmetic number, because the mean of its divisors is an integer number (31668861).

Almost surely, 2^217053316 is an apocalyptic number.

It is an amenable number.

217053316 is a deficient number, since it is larger than the sum of its proper divisors (162973016).

217053316 is a wasteful number, since it uses less digits than its factorization.

217053316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26150 (or 26148 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 217053316 is about 14732.7294144704. The cubic root of 217053316 is about 600.9737115475.

The spelling of 217053316 in words is "two hundred seventeen million, fifty-three thousand, three hundred sixteen".