216416534 has 16 divisors (see below), whose sum is σ = 326909088. Its totient is φ = 107450112.

The previous prime is 216416533. The next prime is 216416537. The reversal of 216416534 is 435614612.

It is a super-2 number, since 2×216416534² = 93672232377146312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216416534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216416533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223319 + ... + 224285.

It is an arithmetic number, because the mean of its divisors is an integer number (20431818).

Almost surely, 2^216416534 is an apocalyptic number.

216416534 is a deficient number, since it is larger than the sum of its proper divisors (110492554).

216416534 is a wasteful number, since it uses less digits than its factorization.

216416534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639.

The product of its digits is 17280, while the sum is 32.

The square root of 216416534 is about 14711.1024060062. The cubic root of 216416534 is about 600.3854319803.

The spelling of 216416534 in words is "two hundred sixteen million, four hundred sixteen thousand, five hundred thirty-four".