105152285145521 has 4 divisors (see below), whose sum is σ = 105152604247152. Its totient is φ = 105151966043892.

The previous prime is 105152285145449. The next prime is 105152285145577. The reversal of 105152285145521 is 125541582251501.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105152285145521 is a prime.

It is a super-2 number, since 2×105152285145521² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105152285145221) 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, 159056015 + ... + 159715748.

It is an arithmetic number, because the mean of its divisors is an integer number (26288151061788).

Almost surely, 2^{105152285145521} is an apocalyptic number.

It is an amenable number.

105152285145521 is a deficient number, since it is larger than the sum of its proper divisors (319101631).

105152285145521 is an equidigital number, since it uses as much as digits as its factorization.

105152285145521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319101630.

The product of its (nonzero) digits is 800000, while the sum is 47.

The spelling of 105152285145521 in words is "one hundred five trillion, one hundred fifty-two billion, two hundred eighty-five million, one hundred forty-five thousand, five hundred twenty-one".