216552131 has 8 divisors (see below), whose sum is σ = 218579760. Its totient is φ = 214531488.

The previous prime is 216552097. The next prime is 216552151. The reversal of 216552131 is 131255612.

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

It is not a de Polignac number, because 216552131 - 2⁶ = 216552067 is a prime.

It is a super-2 number, since 2×216552131² = 93789650881282322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216552131.

It is not an unprimeable number, because it can be changed into a prime (216552151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76025 + ... + 78821.

It is an arithmetic number, because the mean of its divisors is an integer number (27322470).

Almost surely, 2^216552131 is an apocalyptic number.

216552131 is a deficient number, since it is larger than the sum of its proper divisors (2027629).

216552131 is a wasteful number, since it uses less digits than its factorization.

216552131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3493.

The product of its digits is 1800, while the sum is 26.

The square root of 216552131 is about 14715.7103464291. The cubic root of 216552131 is about 600.5107974273.

The spelling of 216552131 in words is "two hundred sixteen million, five hundred fifty-two thousand, one hundred thirty-one".