105321240520 has 32 divisors (see below), whose sum is σ = 237117699000. Its totient is φ = 42102734848.

The previous prime is 105321240503. The next prime is 105321240551. The reversal of 105321240520 is 25042123501.

It can be written as a sum of positive squares in 4 ways, for example, as 89660720356 + 15660520164 = 299434^2 + 125142^2 .

It is a super-2 number, since 2×105321240520² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738745 + ... + 869704.

Almost surely, 2^105321240520 is an apocalyptic number.

105321240520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

105321240520 is an abundant number, since it is smaller than the sum of its proper divisors (131796458480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

105321240520 is a wasteful number, since it uses less digits than its factorization.

105321240520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610097 (or 1610093 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 105321240520 in words is "one hundred five billion, three hundred twenty-one million, two hundred forty thousand, five hundred twenty".