216351332 has 6 divisors (see below), whose sum is σ = 378614838. Its totient is φ = 108175664.

The previous prime is 216351313. The next prime is 216351337. The reversal of 216351332 is 233153612.

It can be written as a sum of positive squares in only one way, i.e., 167547136 + 48804196 = 12944^2 + 6986^2 .

It is not an unprimeable number, because it can be changed into a prime (216351337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27043913 + ... + 27043920.

It is an arithmetic number, because the mean of its divisors is an integer number (63102473).

Almost surely, 2^216351332 is an apocalyptic number.

It is an amenable number.

216351332 is a deficient number, since it is larger than the sum of its proper divisors (162263506).

216351332 is a wasteful number, since it uses less digits than its factorization.

216351332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54087837 (or 54087835 counting only the distinct ones).

The product of its digits is 3240, while the sum is 26.

The square root of 216351332 is about 14708.8861576939. The cubic root of 216351332 is about 600.3251311918.

The spelling of 216351332 in words is "two hundred sixteen million, three hundred fifty-one thousand, three hundred thirty-two".