105115553 has 4 divisors (see below), whose sum is σ = 105871920. Its totient is φ = 104359188.

The previous prime is 105115529. The next prime is 105115601. The reversal of 105115553 is 355511501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 355511501 = 8009 ⋅44389.

It is a cyclic number.

It is not a de Polignac number, because 105115553 - 2⁶ = 105115489 is a prime.

It is a super-2 number, since 2×105115553² = 22098558964991618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105115523) 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, 377975 + ... + 378252.

It is an arithmetic number, because the mean of its divisors is an integer number (26467980).

Almost surely, 2^105115553 is an apocalyptic number.

It is an amenable number.

105115553 is a deficient number, since it is larger than the sum of its proper divisors (756367).

105115553 is an equidigital number, since it uses as much as digits as its factorization.

105115553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756366.

The product of its (nonzero) digits is 1875, while the sum is 26.

The square root of 105115553 is about 10252.5876245951. The cubic root of 105115553 is about 471.9423960751.

The spelling of 105115553 in words is "one hundred five million, one hundred fifteen thousand, five hundred fifty-three".