217052155 has 8 divisors (see below), whose sum is σ = 266815584. Its totient is φ = 169406400.

The previous prime is 217052117. The next prime is 217052161. The reversal of 217052155 is 551250712.

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

It is not a de Polignac number, because 217052155 - 2¹³ = 217043963 is a prime.

It is a super-2 number, since 2×217052155² = 94223275980288050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529191 + ... + 529600.

It is an arithmetic number, because the mean of its divisors is an integer number (33351948).

Almost surely, 2^217052155 is an apocalyptic number.

217052155 is a deficient number, since it is larger than the sum of its proper divisors (49763429).

217052155 is a wasteful number, since it uses less digits than its factorization.

217052155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058837.

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 217052155 is about 14732.6900123501. The cubic root of 217052155 is about 600.9726400262.

The spelling of 217052155 in words is "two hundred seventeen million, fifty-two thousand, one hundred fifty-five".