21482261451511 has 64 divisors (see below), whose sum is σ = 26961604577280. Its totient is φ = 16711743121920.

The previous prime is 21482261451509. The next prime is 21482261451577. The reversal of 21482261451511 is 11515416228412.

It is not a de Polignac number, because 21482261451511 - 2¹ = 21482261451509 is a prime.

It is a super-2 number, since 2×21482261451511² (a number of 27 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 (21482261451011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 131616925 + ... + 131780041.

It is an arithmetic number, because the mean of its divisors is an integer number (421275071520).

Almost surely, 2^{21482261451511} is an apocalyptic number.

21482261451511 is a deficient number, since it is larger than the sum of its proper divisors (5479343125769).

21482261451511 is a wasteful number, since it uses less digits than its factorization.

21482261451511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163664.

The product of its digits is 153600, while the sum is 43.

Adding to 21482261451511 its reverse (11515416228412), we get a palindrome (32997677679923).

The spelling of 21482261451511 in words is "twenty-one trillion, four hundred eighty-two billion, two hundred sixty-one million, four hundred fifty-one thousand, five hundred eleven".