15423381 has 6 divisors (see below), whose sum is σ = 22278230. Its totient is φ = 10282248.

The previous prime is 15423329. The next prime is 15423427. The reversal of 15423381 is 18332451.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12895281 + 2528100 = 3591^2 + 1590^2 .

It is not a de Polignac number, because 15423381 - 2¹¹ = 15421333 is a prime.

It is a super-2 number, since 2×15423381² = 475761362942322, 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 (15423311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 856846 + ... + 856863.

Almost surely, 2^15423381 is an apocalyptic number.

It is an amenable number.

15423381 is a deficient number, since it is larger than the sum of its proper divisors (6854849).

15423381 is a wasteful number, since it uses less digits than its factorization.

15423381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713715 (or 1713712 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 15423381 is about 3927.2612594530. The cubic root of 15423381 is about 248.9200401311.

The spelling of 15423381 in words is "fifteen million, four hundred twenty-three thousand, three hundred eighty-one".