100521320 has 16 divisors (see below), whose sum is σ = 226173060. Its totient is φ = 40208512.

The previous prime is 100521319. The next prime is 100521331. The reversal of 100521320 is 23125001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 99161764 + 1359556 = 9958^2 + 1166^2 .

It is a super-3 number, since 3×100521320³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100521295 and 100521304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1256477 + ... + 1256556.

Almost surely, 2^100521320 is an apocalyptic number.

100521320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100521320 is an abundant number, since it is smaller than the sum of its proper divisors (125651740).

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

100521320 is a wasteful number, since it uses less digits than its factorization.

100521320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513044 (or 2513040 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 100521320 is about 10026.0321164457. The cubic root of 100521320 is about 464.9640701417.

Adding to 100521320 its reverse (23125001), we get a palindrome (123646321).

The spelling of 100521320 in words is "one hundred million, five hundred twenty-one thousand, three hundred twenty".