15243381 has 12 divisors (see below), whose sum is σ = 22053408. Its totient is φ = 10146024.

The previous prime is 15243379. The next prime is 15243401. The reversal of 15243381 is 18334251.

It is a happy number.

15243381 is a `hidden beast` number, since 152 + 433 + 81 = 666.

15243381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15243381 - 2¹ = 15243379 is a prime.

It is a super-2 number, since 2×15243381² = 464721328622322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15243311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7986 + ... + 9708.

It is an arithmetic number, because the mean of its divisors is an integer number (1837784).

Almost surely, 2^15243381 is an apocalyptic number.

It is an amenable number.

15243381 is a deficient number, since it is larger than the sum of its proper divisors (6810027).

15243381 is a wasteful number, since it uses less digits than its factorization.

15243381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712 (or 2709 counting only the distinct ones).

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

The square root of 15243381 is about 3904.2772698670. The cubic root of 15243381 is about 247.9479003027.

The spelling of 15243381 in words is "fifteen million, two hundred forty-three thousand, three hundred eighty-one".