21514544541512 has 16 divisors (see below), whose sum is σ = 44007022926000. Its totient is φ = 9779338427920.

The previous prime is 21514544541463. The next prime is 21514544541521.

It is a happy number.

21514544541512 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21514544541512² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122241730262 + ... + 122241730437.

It is an arithmetic number, because the mean of its divisors is an integer number (2750438932875).

Almost surely, 2^{21514544541512} is an apocalyptic number.

21514544541512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21514544541512 is an abundant number, since it is smaller than the sum of its proper divisors (22492478384488).

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

21514544541512 is a wasteful number, since it uses less digits than its factorization.

21514544541512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244483460716 (or 244483460712 counting only the distinct ones).

The product of its digits is 640000, while the sum is 44.

It can be divided in two parts, 2151454 and 4541512, that added together give a palindrome (6692966).

The spelling of 21514544541512 in words is "twenty-one trillion, five hundred fourteen billion, five hundred forty-four million, five hundred forty-one thousand, five hundred twelve".