15648139 has 8 divisors (see below), whose sum is σ = 17433360. Its totient is φ = 13946016.

The previous prime is 15648131. The next prime is 15648161. The reversal of 15648139 is 93184651.

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 15648139 - 2³ = 15648131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15648098 and 15648107.

It is not an unprimeable number, because it can be changed into a prime (15648131) 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, 20377 + ... + 21130.

It is an arithmetic number, because the mean of its divisors is an integer number (2179170).

Almost surely, 2^15648139 is an apocalyptic number.

15648139 is a deficient number, since it is larger than the sum of its proper divisors (1785221).

15648139 is a wasteful number, since it uses less digits than its factorization.

15648139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41549.

The product of its digits is 25920, while the sum is 37.

The square root of 15648139 is about 3955.7728701229. The cubic root of 15648139 is about 250.1233471319.

It can be divided in two parts, 156481 and 39, that added together give a triangular number (156520 = T₅₅₉).

The spelling of 15648139 in words is "fifteen million, six hundred forty-eight thousand, one hundred thirty-nine".