15230981 has 8 divisors (see below), whose sum is σ = 15609240. Its totient is φ = 14856192.

The previous prime is 15230947. The next prime is 15231001. The reversal of 15230981 is 18903251.

It can be written as a sum of positive squares in 4 ways, for example, as 722500 + 14508481 = 850^2 + 3809^2 .

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 15230981 - 2¹⁴ = 15214597 is a prime.

It is a super-2 number, since 2×15230981² = 463965564444722, 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 (15230911) 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, 9485 + ... + 10973.

It is an arithmetic number, because the mean of its divisors is an integer number (1951155).

Almost surely, 2^15230981 is an apocalyptic number.

It is an amenable number.

15230981 is a deficient number, since it is larger than the sum of its proper divisors (378259).

15230981 is a wasteful number, since it uses less digits than its factorization.

15230981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 15230981 is about 3902.6889448174. The cubic root of 15230981 is about 247.8806495175.

The spelling of 15230981 in words is "fifteen million, two hundred thirty thousand, nine hundred eighty-one".