21520241431310 has 8 divisors (see below), whose sum is σ = 38736434576376. Its totient is φ = 8608096572520.

The previous prime is 21520241431289. The next prime is 21520241431331. The reversal of 21520241431310 is 1313414202512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21520241431289) and next prime (21520241431331).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21520241431310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1076012071556 + ... + 1076012071575.

It is an arithmetic number, because the mean of its divisors is an integer number (4842054322047).

Almost surely, 2^{21520241431310} is an apocalyptic number.

21520241431310 is a deficient number, since it is larger than the sum of its proper divisors (17216193145066).

21520241431310 is a wasteful number, since it uses less digits than its factorization.

21520241431310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152024143138.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 21520241431310 its reverse (1313414202512), we get a palindrome (22833655633822).

The spelling of 21520241431310 in words is "twenty-one trillion, five hundred twenty billion, two hundred forty-one million, four hundred thirty-one thousand, three hundred ten".