15481901 has 2 divisors, whose sum is σ = 15481902. Its totient is φ = 15481900.

The previous prime is 15481897. The next prime is 15481933. The reversal of 15481901 is 10918451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9156676 + 6325225 = 3026^2 + 2515^2 .

It is a cyclic number.

It is not a de Polignac number, because 15481901 - 2² = 15481897 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15481981) 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, 7740950 + 7740951.

It is an arithmetic number, because the mean of its divisors is an integer number (7740951).

Almost surely, 2^15481901 is an apocalyptic number.

It is an amenable number.

15481901 is a deficient number, since it is larger than the sum of its proper divisors (1).

15481901 is an equidigital number, since it uses as much as digits as its factorization.

15481901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 15481901 is about 3934.7046903167. The cubic root of 15481901 is about 249.2344635418.

The spelling of 15481901 in words is "fifteen million, four hundred eighty-one thousand, nine hundred one".