217052156 has 6 divisors (see below), whose sum is σ = 379841280. Its totient is φ = 108526076.

The previous prime is 217052117. The next prime is 217052161. The reversal of 217052156 is 651250712.

It is a super-2 number, since 2×217052156² = 94223276848496672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27131516 + ... + 27131523.

It is an arithmetic number, because the mean of its divisors is an integer number (63306880).

Almost surely, 2^217052156 is an apocalyptic number.

It is an amenable number.

217052156 is a deficient number, since it is larger than the sum of its proper divisors (162789124).

217052156 is a wasteful number, since it uses less digits than its factorization.

217052156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54263043 (or 54263041 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 217052156 is about 14732.6900462882. The cubic root of 217052156 is about 600.9726409492.

The spelling of 217052156 in words is "two hundred seventeen million, fifty-two thousand, one hundred fifty-six".