216312734 has 16 divisors (see below), whose sum is σ = 354913920. Its totient is φ = 98060760.

The previous prime is 216312731. The next prime is 216312737. The reversal of 216312734 is 437213612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (216312731) and next prime (216312737).

It is a junction number, because it is equal to n+sod(n) for n = 216312697 and 216312706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216312731) 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, 4634 + ... + 21309.

It is an arithmetic number, because the mean of its divisors is an integer number (22182120).

Almost surely, 2^216312734 is an apocalyptic number.

216312734 is a deficient number, since it is larger than the sum of its proper divisors (138601186).

216312734 is a wasteful number, since it uses less digits than its factorization.

216312734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26335.

The product of its digits is 6048, while the sum is 29.

The square root of 216312734 is about 14707.5740351698. The cubic root of 216312734 is about 600.2894288809.

The spelling of 216312734 in words is "two hundred sixteen million, three hundred twelve thousand, seven hundred thirty-four".