212440412015 has 16 divisors (see below), whose sum is σ = 275255221248. Its totient is φ = 156469449216.

The previous prime is 212440412011. The next prime is 212440412017. The reversal of 212440412015 is 510214044212.

It is a cyclic number.

It is not a de Polignac number, because 212440412015 - 2² = 212440412011 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 (212440412011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4241834 + ... + 4291623.

It is an arithmetic number, because the mean of its divisors is an integer number (17203451328).

Almost surely, 2^212440412015 is an apocalyptic number.

212440412015 is a deficient number, since it is larger than the sum of its proper divisors (62814809233).

212440412015 is a wasteful number, since it uses less digits than its factorization.

212440412015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8533858.

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 212440412015 its reverse (510214044212), we get a palindrome (722654456227).

The spelling of 212440412015 in words is "two hundred twelve billion, four hundred forty million, four hundred twelve thousand, fifteen".