15138161 has 4 divisors (see below), whose sum is σ = 15394800. Its totient is φ = 14881524.

The previous prime is 15138139. The next prime is 15138197. The reversal of 15138161 is 16183151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15138161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15138161.

It is not an unprimeable number, because it can be changed into a prime (15138131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128231 + ... + 128348.

It is an arithmetic number, because the mean of its divisors is an integer number (3848700).

Almost surely, 2^15138161 is an apocalyptic number.

It is an amenable number.

15138161 is a deficient number, since it is larger than the sum of its proper divisors (256639).

15138161 is an equidigital number, since it uses as much as digits as its factorization.

15138161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256638.

The product of its digits is 720, while the sum is 26.

The square root of 15138161 is about 3890.7789708489. The cubic root of 15138161 is about 247.3760818980.

The spelling of 15138161 in words is "fifteen million, one hundred thirty-eight thousand, one hundred sixty-one".