21313114015 has 4 divisors (see below), whose sum is σ = 25575736824. Its totient is φ = 17050491208.

The previous prime is 21313114007. The next prime is 21313114019. The reversal of 21313114015 is 51041131312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21313114015 - 2³ = 21313114007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313114019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2131311397 + ... + 2131311406.

It is an arithmetic number, because the mean of its divisors is an integer number (6393934206).

Almost surely, 2^21313114015 is an apocalyptic number.

21313114015 is a deficient number, since it is larger than the sum of its proper divisors (4262622809).

21313114015 is an equidigital number, since it uses as much as digits as its factorization.

21313114015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262622808.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 21313114015 its reverse (51041131312), we get a palindrome (72354245327).

The spelling of 21313114015 in words is "twenty-one billion, three hundred thirteen million, one hundred fourteen thousand, fifteen".