216707724328431 has 32 divisors (see below), whose sum is σ = 335152953602560. Its totient is φ = 121983645966336.

The previous prime is 216707724328373. The next prime is 216707724328439. The reversal of 216707724328431 is 134823427707612.

It is not a de Polignac number, because 216707724328431 - 2²¹ = 216707722231279 is a prime.

It is a super-2 number, since 2×216707724328431² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216707724328439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173080215 + ... + 174327783.

It is an arithmetic number, because the mean of its divisors is an integer number (10473529800080).

Almost surely, 2^{216707724328431} is an apocalyptic number.

216707724328431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

216707724328431 is a deficient number, since it is larger than the sum of its proper divisors (118445229274129).

216707724328431 is a wasteful number, since it uses less digits than its factorization.

216707724328431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371103.

The product of its (nonzero) digits is 18966528, while the sum is 57.

The spelling of 216707724328431 in words is "two hundred sixteen trillion, seven hundred seven billion, seven hundred twenty-four million, three hundred twenty-eight thousand, four hundred thirty-one".