551500139 has 4 divisors (see below), whose sum is σ = 561905856. Its totient is φ = 541094424.

The previous prime is 551500109. The next prime is 551500151. The reversal of 551500139 is 931005155.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551500139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551500109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5202779 + ... + 5202884.

It is an arithmetic number, because the mean of its divisors is an integer number (140476464).

Almost surely, 2^551500139 is an apocalyptic number.

551500139 is a deficient number, since it is larger than the sum of its proper divisors (10405717).

551500139 is a wasteful number, since it uses less digits than its factorization.

551500139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10405716.

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

The square root of 551500139 is about 23484.0400910917. The cubic root of 551500139 is about 820.0655009148.

The spelling of 551500139 in words is "five hundred fifty-one million, five hundred thousand, one hundred thirty-nine".