216888130438 has 16 divisors (see below), whose sum is σ = 371946558240. Its totient is φ = 92917472256.

The previous prime is 216888130397. The next prime is 216888130439. The reversal of 216888130438 is 834031888612.

It is a super-2 number, since 2×216888130438² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216888130439) 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, 2842981 + ... + 2918272.

It is an arithmetic number, because the mean of its divisors is an integer number (23246659890).

Almost surely, 2^216888130438 is an apocalyptic number.

216888130438 is a deficient number, since it is larger than the sum of its proper divisors (155058427802).

216888130438 is a wasteful number, since it uses less digits than its factorization.

216888130438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5763951.

The product of its (nonzero) digits is 1769472, while the sum is 52.

The spelling of 216888130438 in words is "two hundred sixteen billion, eight hundred eighty-eight million, one hundred thirty thousand, four hundred thirty-eight".