216842536 has 8 divisors (see below), whose sum is σ = 406579770. Its totient is φ = 108421264.

The previous prime is 216842477. The next prime is 216842543. The reversal of 216842536 is 635248612.

It can be written as a sum of positive squares in only one way, i.e., 171872100 + 44970436 = 13110^2 + 6706^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×216842536² = 94041370837822592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216842495 and 216842504.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13552651 + ... + 13552666.

Almost surely, 2^216842536 is an apocalyptic number.

It is an amenable number.

216842536 is a deficient number, since it is larger than the sum of its proper divisors (189737234).

216842536 is a wasteful number, since it uses less digits than its factorization.

216842536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27105323 (or 27105319 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 216842536 is about 14725.5742163082. The cubic root of 216842536 is about 600.7791137909.

The spelling of 216842536 in words is "two hundred sixteen million, eight hundred forty-two thousand, five hundred thirty-six".