15103981 has 8 divisors (see below), whose sum is σ = 15321600. Its totient is φ = 14888208.

The previous prime is 15103969. The next prime is 15103999. The reversal of 15103981 is 18930151.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15103981 - 2⁷ = 15103853 is a prime.

It is a super-2 number, since 2×15103981² = 456260484096722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15103951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24580 + ... + 25186.

It is an arithmetic number, because the mean of its divisors is an integer number (1915200).

Almost surely, 2^15103981 is an apocalyptic number.

It is an amenable number.

15103981 is a deficient number, since it is larger than the sum of its proper divisors (217619).

15103981 is a wasteful number, since it uses less digits than its factorization.

15103981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 15103981 is about 3886.3840520463. The cubic root of 15103981 is about 247.1897605842.

The spelling of 15103981 in words is "fifteen million, one hundred three thousand, nine hundred eighty-one".