103551309 has 6 divisors (see below), whose sum is σ = 149574126. Its totient is φ = 69034200.

The previous prime is 103551269. The next prime is 103551317. The reversal of 103551309 is 903155301.

103551309 is a `hidden beast` number, since 1 + 0 + 355 + 1 + 309 = 666.

It can be written as a sum of positive squares in only one way, i.e., 83997225 + 19554084 = 9165^2 + 4422^2 .

It is not a de Polignac number, because 103551309 - 2¹³ = 103543117 is a prime.

It is a super-3 number, since 3×103551309³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103551319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5752842 + ... + 5752859.

It is an arithmetic number, because the mean of its divisors is an integer number (24929021).

Almost surely, 2^103551309 is an apocalyptic number.

It is an amenable number.

103551309 is a deficient number, since it is larger than the sum of its proper divisors (46022817).

103551309 is a wasteful number, since it uses less digits than its factorization.

103551309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11505707 (or 11505704 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 27.

The square root of 103551309 is about 10176.0163620151. The cubic root of 103551309 is about 469.5896660054.

It can be divided in two parts, 10355 and 1309, that added together give a square (11664 = 108²).

The spelling of 103551309 in words is "one hundred three million, five hundred fifty-one thousand, three hundred nine".