105421512823 has 16 divisors (see below), whose sum is σ = 115490707200. Its totient is φ = 95433472000.

The previous prime is 105421512811. The next prime is 105421512829. The reversal of 105421512823 is 328215124501.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105421512823 is a prime.

It is a super-2 number, since 2×105421512823² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105421512829) 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, 15972078 + ... + 15978676.

It is an arithmetic number, because the mean of its divisors is an integer number (7218169200).

Almost surely, 2^105421512823 is an apocalyptic number.

105421512823 is a deficient number, since it is larger than the sum of its proper divisors (10069194377).

105421512823 is a wasteful number, since it uses less digits than its factorization.

105421512823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12518.

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 105421512823 in words is "one hundred five billion, four hundred twenty-one million, five hundred twelve thousand, eight hundred twenty-three".