105513001553 has 4 divisors (see below), whose sum is σ = 105514374708. Its totient is φ = 105511628400.

The previous prime is 105513001537. The next prime is 105513001571. The reversal of 105513001553 is 355100315501.

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 38758978129 + 66754023424 = 196873^2 + 258368^2 .

It is a cyclic number.

It is not a de Polignac number, because 105513001553 - 2⁴ = 105513001537 is a prime.

It is a super-2 number, since 2×105513001553² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (105513001753) 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, 564026 + ... + 727427.

It is an arithmetic number, because the mean of its divisors is an integer number (26378593677).

Almost surely, 2^105513001553 is an apocalyptic number.

It is an amenable number.

105513001553 is a deficient number, since it is larger than the sum of its proper divisors (1373155).

105513001553 is an equidigital number, since it uses as much as digits as its factorization.

105513001553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373154.

The product of its (nonzero) digits is 5625, while the sum is 29.

The spelling of 105513001553 in words is "one hundred five billion, five hundred thirteen million, one thousand, five hundred fifty-three".