15158138 has 4 divisors (see below), whose sum is σ = 22737210. Its totient is φ = 7579068.

The previous prime is 15158137. The next prime is 15158149. The reversal of 15158138 is 83185151.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12652249 + 2505889 = 3557^2 + 1583^2 .

It is not an unprimeable number, because it can be changed into a prime (15158137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3789533 + ... + 3789536.

Almost surely, 2^15158138 is an apocalyptic number.

15158138 is a deficient number, since it is larger than the sum of its proper divisors (7579072).

15158138 is an equidigital number, since it uses as much as digits as its factorization.

15158138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7579071.

The product of its digits is 4800, while the sum is 32.

The square root of 15158138 is about 3893.3453481550. The cubic root of 15158138 is about 247.4848502783.

The spelling of 15158138 in words is "fifteen million, one hundred fifty-eight thousand, one hundred thirty-eight".