15059981 has 2 divisors, whose sum is σ = 15059982. Its totient is φ = 15059980.

The previous prime is 15059971. The next prime is 15059987. The reversal of 15059981 is 18995051.

15059981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14891881 + 168100 = 3859^2 + 410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15059981 is a prime.

It is a super-3 number, since 3×15059981³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15059987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7529990 + 7529991.

It is an arithmetic number, because the mean of its divisors is an integer number (7529991).

Almost surely, 2^15059981 is an apocalyptic number.

It is an amenable number.

15059981 is a deficient number, since it is larger than the sum of its proper divisors (1).

15059981 is an equidigital number, since it uses as much as digits as its factorization.

15059981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 15059981 is about 3880.7191343873. The cubic root of 15059981 is about 246.9494943914.

The spelling of 15059981 in words is "fifteen million, fifty-nine thousand, nine hundred eighty-one".