215123411015 has 16 divisors (see below), whose sum is σ = 273347822880. Its totient is φ = 161966653440.

The previous prime is 215123410969. The next prime is 215123411017. The reversal of 215123411015 is 510114321512.

It is not a de Polignac number, because 215123411015 - 2⁶ = 215123410951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215123411017) 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, 1862471 + ... + 1974599.

It is an arithmetic number, because the mean of its divisors is an integer number (17084238930).

Almost surely, 2^215123411015 is an apocalyptic number.

215123411015 is a deficient number, since it is larger than the sum of its proper divisors (58224411865).

215123411015 is a wasteful number, since it uses less digits than its factorization.

215123411015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134722.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 215123411015 its reverse (510114321512), we get a palindrome (725237732527).

The spelling of 215123411015 in words is "two hundred fifteen billion, one hundred twenty-three million, four hundred eleven thousand, fifteen".