2155423023105 has 32 divisors (see below), whose sum is σ = 3762313868160. Its totient is φ = 1045019988480.

The previous prime is 2155423023067. The next prime is 2155423023113. The reversal of 2155423023105 is 5013203245512.

It is not a de Polignac number, because 2155423023105 - 2⁹ = 2155423022593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5388709 + ... + 5774861.

It is an arithmetic number, because the mean of its divisors is an integer number (117572308380).

Almost surely, 2^{2155423023105} is an apocalyptic number.

It is an amenable number.

2155423023105 is a deficient number, since it is larger than the sum of its proper divisors (1606890845055).

2155423023105 is a wasteful number, since it uses less digits than its factorization.

2155423023105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420001.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 2155423023105 its reverse (5013203245512), we get a palindrome (7168626268617).

The spelling of 2155423023105 in words is "two trillion, one hundred fifty-five billion, four hundred twenty-three million, twenty-three thousand, one hundred five".