15380981 has 8 divisors (see below), whose sum is σ = 19176384. Its totient is φ = 11985120.

The previous prime is 15380947. The next prime is 15380983. The reversal of 15380981 is 18908351.

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

It is not a de Polignac number, because 15380981 - 2⁶ = 15380917 is a prime.

It is a super-2 number, since 2×15380981² = 473149153044722, 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 (15380983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99800 + ... + 99953.

It is an arithmetic number, because the mean of its divisors is an integer number (2397048).

Almost surely, 2^15380981 is an apocalyptic number.

15380981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15380981 is a deficient number, since it is larger than the sum of its proper divisors (3795403).

15380981 is a wasteful number, since it uses less digits than its factorization.

15380981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199771.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 15380981 is about 3921.8593804470. The cubic root of 15380981 is about 248.6917310046.

It can be divided in two parts, 15380 and 981, that added together give a palindrome (16361).

The spelling of 15380981 in words is "fifteen million, three hundred eighty thousand, nine hundred eighty-one".