15540229 has 2 divisors, whose sum is σ = 15540230. Its totient is φ = 15540228.

The previous prime is 15540223. The next prime is 15540241. The reversal of 15540229 is 92204551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10227204 + 5313025 = 3198^2 + 2305^2 .

It is a cyclic number.

It is not a de Polignac number, because 15540229 - 2¹³ = 15532037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15540197 and 15540206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15540223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7770114 + 7770115.

It is an arithmetic number, because the mean of its divisors is an integer number (7770115).

Almost surely, 2^15540229 is an apocalyptic number.

It is an amenable number.

15540229 is a deficient number, since it is larger than the sum of its proper divisors (1).

15540229 is an equidigital number, since it uses as much as digits as its factorization.

15540229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 15540229 is about 3942.1097143535. The cubic root of 15540229 is about 249.5470679056.

The spelling of 15540229 in words is "fifteen million, five hundred forty thousand, two hundred twenty-nine".