213515122015 has 8 divisors (see below), whose sum is σ = 275927234688. Its totient is φ = 157672705440.

The previous prime is 213515121931. The next prime is 213515122021. The reversal of 213515122015 is 510221515312.

It is a happy number.

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

It is not a de Polignac number, because 213515122015 - 2²¹ = 213513024863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1642423951 + ... + 1642424080.

It is an arithmetic number, because the mean of its divisors is an integer number (34490904336).

Almost surely, 2^213515122015 is an apocalyptic number.

213515122015 is a deficient number, since it is larger than the sum of its proper divisors (62412112673).

213515122015 is a wasteful number, since it uses less digits than its factorization.

213515122015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3284848049.

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 213515122015 its reverse (510221515312), we get a palindrome (723736637327).

The spelling of 213515122015 in words is "two hundred thirteen billion, five hundred fifteen million, one hundred twenty-two thousand, fifteen".