15535001 has 2 divisors, whose sum is σ = 15535002. Its totient is φ = 15535000.

The previous prime is 15534983. The next prime is 15535033. The reversal of 15535001 is 10053551.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14622976 + 912025 = 3824^2 + 955^2 .

It is a cyclic number.

It is not a de Polignac number, because 15535001 - 2¹⁰ = 15533977 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (15535081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7767500 + 7767501.

It is an arithmetic number, because the mean of its divisors is an integer number (7767501).

Almost surely, 2^15535001 is an apocalyptic number.

It is an amenable number.

15535001 is a deficient number, since it is larger than the sum of its proper divisors (1).

15535001 is an equidigital number, since it uses as much as digits as its factorization.

15535001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 15535001 is about 3941.4465618603. The cubic root of 15535001 is about 249.5190807934.

Adding to 15535001 its reverse (10053551), we get a palindrome (25588552).

The spelling of 15535001 in words is "fifteen million, five hundred thirty-five thousand, one".