21512323310541 has 16 divisors (see below), whose sum is σ = 34708958619264. Its totient is φ = 11569652872704.

The previous prime is 21512323310509. The next prime is 21512323310579. The reversal of 21512323310541 is 14501332321512.

It is a happy number.

It is not a de Polignac number, because 21512323310541 - 2⁵ = 21512323310509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21512323311541) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 30129304000 + ... + 30129304713.

It is an arithmetic number, because the mean of its divisors is an integer number (2169309913704).

Almost surely, 2^{21512323310541} is an apocalyptic number.

21512323310541 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21512323310541 is a deficient number, since it is larger than the sum of its proper divisors (13196635308723).

21512323310541 is a wasteful number, since it uses less digits than its factorization.

21512323310541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60258608740.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 21512323310541 in words is "twenty-one trillion, five hundred twelve billion, three hundred twenty-three million, three hundred ten thousand, five hundred forty-one".