216521032040310 has 16 divisors (see below), whose sum is σ = 519650476896816. Its totient is φ = 57738941877408.

The previous prime is 216521032040213. The next prime is 216521032040387. The reversal of 216521032040310 is 13040230125612.

It is a super-2 number, since 2×216521032040310² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 7217367734677 = 216521032040310 / (2 + 1 + 6 + 5 + 2 + 1 + 0 + 3 + 2 + 0 + 4 + 0 + 3 + 1 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3608683867309 + ... + 3608683867368.

It is an arithmetic number, because the mean of its divisors is an integer number (32478154806051).

Almost surely, 2^{216521032040310} is an apocalyptic number.

216521032040310 is an abundant number, since it is smaller than the sum of its proper divisors (303129444856506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216521032040310 is a wasteful number, since it uses less digits than its factorization.

216521032040310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7217367734687.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 216521032040310 its reverse (13040230125612), we get a palindrome (229561262165922).

The spelling of 216521032040310 in words is "two hundred sixteen trillion, five hundred twenty-one billion, thirty-two million, forty thousand, three hundred ten".