2105523101455 has 16 divisors (see below), whose sum is σ = 2579360919264. Its totient is φ = 1649506308480.

The previous prime is 2105523101443. The next prime is 2105523101459. The reversal of 2105523101455 is 5541013255012.

It is not a de Polignac number, because 2105523101455 - 2¹³ = 2105523093263 is a prime.

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 2105523101455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105523101459) 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, 15136392 + ... + 15274861.

It is an arithmetic number, because the mean of its divisors is an integer number (161210057454).

Almost surely, 2^{2105523101455} is an apocalyptic number.

2105523101455 is a deficient number, since it is larger than the sum of its proper divisors (473837817809).

2105523101455 is a wasteful number, since it uses less digits than its factorization.

2105523101455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30411546.

The product of its (nonzero) digits is 30000, while the sum is 34.

Adding to 2105523101455 its reverse (5541013255012), we get a palindrome (7646536356467).

The spelling of 2105523101455 in words is "two trillion, one hundred five billion, five hundred twenty-three million, one hundred one thousand, four hundred fifty-five".