2105513023153 has 4 divisors (see below), whose sum is σ = 2106637164388. Its totient is φ = 2104388881920.

The previous prime is 2105513023129. The next prime is 2105513023181. The reversal of 2105513023153 is 3513203155012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 53809153024 + 2051703870129 = 231968^2 + 1432377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2105513023153 is a prime.

It is a super-2 number, since 2×2105513023153² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105513023183) 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, 562067808 + ... + 562071553.

It is an arithmetic number, because the mean of its divisors is an integer number (526659291097).

Almost surely, 2^{2105513023153} is an apocalyptic number.

It is an amenable number.

2105513023153 is a deficient number, since it is larger than the sum of its proper divisors (1124141235).

2105513023153 is a wasteful number, since it uses less digits than its factorization.

2105513023153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124141234.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 2105513023153 its reverse (3513203155012), we get a palindrome (5618716178165).

The spelling of 2105513023153 in words is "two trillion, one hundred five billion, five hundred thirteen million, twenty-three thousand, one hundred fifty-three".