216171436 has 24 divisors (see below), whose sum is σ = 428844080. Its totient is φ = 94519872.

The previous prime is 216171433. The next prime is 216171443. The reversal of 216171436 is 634171612.

It is a junction number, because it is equal to n+sod(n) for n = 216171398 and 216171407.

It is not an unprimeable number, because it can be changed into a prime (216171433) 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, 108411 + ... + 110386.

Almost surely, 2^216171436 is an apocalyptic number.

216171436 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

216171436 is a deficient number, since it is larger than the sum of its proper divisors (212672644).

216171436 is a wasteful number, since it uses less digits than its factorization.

216171436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218833 (or 218831 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 216171436 is about 14702.7696710518. The cubic root of 216171436 is about 600.1586950598.

The spelling of 216171436 in words is "two hundred sixteen million, one hundred seventy-one thousand, four hundred thirty-six".