15550139 has 8 divisors (see below), whose sum is σ = 17701632. Its totient is φ = 13521640.

The previous prime is 15550103. The next prime is 15550141. The reversal of 15550139 is 93105551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15550139 - 2¹² = 15546043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15550159) 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, 30479 + ... + 30984.

It is an arithmetic number, because the mean of its divisors is an integer number (2212704).

Almost surely, 2^15550139 is an apocalyptic number.

15550139 is a deficient number, since it is larger than the sum of its proper divisors (2151493).

15550139 is a wasteful number, since it uses less digits than its factorization.

15550139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61497.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 15550139 is about 3943.3664552004. The cubic root of 15550139 is about 249.6001020008.

The spelling of 15550139 in words is "fifteen million, five hundred fifty thousand, one hundred thirty-nine".