215623532401267 has 4 divisors (see below), whose sum is σ = 215725578561640. Its totient is φ = 215521486240896.

The previous prime is 215623532401247. The next prime is 215623532401273. The reversal of 215623532401267 is 762104235326512.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215623532401267 is a prime.

It is a super-2 number, since 2×215623532401267² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215623532401267.

It is not an unprimeable number, because it can be changed into a prime (215623532401247) 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, 51023077017 + ... + 51023081242.

It is an arithmetic number, because the mean of its divisors is an integer number (53931394640410).

Almost surely, 2^{215623532401267} is an apocalyptic number.

215623532401267 is a deficient number, since it is larger than the sum of its proper divisors (102046160373).

215623532401267 is a wasteful number, since it uses less digits than its factorization.

215623532401267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102046160372.

The product of its (nonzero) digits is 3628800, while the sum is 49.

Adding to 215623532401267 its reverse (762104235326512), we get a palindrome (977727767727779).

The spelling of 215623532401267 in words is "two hundred fifteen trillion, six hundred twenty-three billion, five hundred thirty-two million, four hundred one thousand, two hundred sixty-seven".