21115514615313 has 8 divisors (see below), whose sum is σ = 28840702889376. Its totient is φ = 13733668042400.

The previous prime is 21115514615311. The next prime is 21115514615333. The reversal of 21115514615313 is 31351641551112.

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

It is a cyclic number.

It is not a de Polignac number, because 21115514615313 - 2¹ = 21115514615311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21115514615311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85835425143 + ... + 85835425388.

It is an arithmetic number, because the mean of its divisors is an integer number (3605087861172).

Almost surely, 2^{21115514615313} is an apocalyptic number.

It is an amenable number.

21115514615313 is a deficient number, since it is larger than the sum of its proper divisors (7725188274063).

21115514615313 is a wasteful number, since it uses less digits than its factorization.

21115514615313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171670850575.

The product of its digits is 54000, while the sum is 39.

The spelling of 21115514615313 in words is "twenty-one trillion, one hundred fifteen billion, five hundred fourteen million, six hundred fifteen thousand, three hundred thirteen".