215145111423 has 32 divisors (see below), whose sum is σ = 331778764800. Its totient is φ = 122639551200.

The previous prime is 215145111409. The next prime is 215145111431. The reversal of 215145111423 is 324111541512.

It is not a de Polignac number, because 215145111423 - 2¹⁶ = 215145045887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215145112423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1147143 + ... + 1321448.

It is an arithmetic number, because the mean of its divisors is an integer number (10368086400).

Almost surely, 2^215145111423 is an apocalyptic number.

215145111423 is a deficient number, since it is larger than the sum of its proper divisors (116633653377).

215145111423 is a wasteful number, since it uses less digits than its factorization.

215145111423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468763.

The product of its digits is 4800, while the sum is 30.

Adding to 215145111423 its reverse (324111541512), we get a palindrome (539256652935).

The spelling of 215145111423 in words is "two hundred fifteen billion, one hundred forty-five million, one hundred eleven thousand, four hundred twenty-three".