103551521 has 2 divisors, whose sum is σ = 103551522. Its totient is φ = 103551520.

The previous prime is 103551509. The next prime is 103551529. The reversal of 103551521 is 125155301.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64000000 + 39551521 = 8000^2 + 6289^2 .

It is a cyclic number.

It is not a de Polignac number, because 103551521 - 2⁶ = 103551457 is a prime.

It is a super-3 number, since 3×103551521³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (103551529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51775760 + 51775761.

It is an arithmetic number, because the mean of its divisors is an integer number (51775761).

Almost surely, 2^103551521 is an apocalyptic number.

It is an amenable number.

103551521 is a deficient number, since it is larger than the sum of its proper divisors (1).

103551521 is an equidigital number, since it uses as much as digits as its factorization.

103551521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 103551521 is about 10176.0267786597. The cubic root of 103551521 is about 469.5899864679.

The spelling of 103551521 in words is "one hundred three million, five hundred fifty-one thousand, five hundred twenty-one".