21513043200144 has 80 divisors (see below), whose sum is σ = 56246554490112. Its totient is φ = 7084413815424.

The previous prime is 21513043200101. The next prime is 21513043200161. The reversal of 21513043200144 is 44100234031512.

It is a super-2 number, since 2×21513043200144² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212388199 + ... + 212489465.

Almost surely, 2^{21513043200144} is an apocalyptic number.

21513043200144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21513043200144 is an abundant number, since it is smaller than the sum of its proper divisors (34733511289968).

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

21513043200144 is a wasteful number, since it uses less digits than its factorization.

21513043200144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154684 (or 154678 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 21513043200144 its reverse (44100234031512), we get a palindrome (65613277231656).

The spelling of 21513043200144 in words is "twenty-one trillion, five hundred thirteen billion, forty-three million, two hundred thousand, one hundred forty-four".