551832138 has 96 divisors (see below), whose sum is σ = 1487408832. Its totient is φ = 145267200.

The previous prime is 551832137. The next prime is 551832139. The reversal of 551832138 is 831238155.

551832138 is a `hidden beast` number, since 5 + 518 + 3 + 2 + 138 = 666.

It is an interprime number because it is at equal distance from previous prime (551832137) and next prime (551832139).

It is not an unprimeable number, because it can be changed into a prime (551832137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37453 + ... + 50063.

It is an arithmetic number, because the mean of its divisors is an integer number (15493842).

Almost surely, 2^551832138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551832138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (743704416).

551832138 is an abundant number, since it is smaller than the sum of its proper divisors (935576694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551832138 is a wasteful number, since it uses less digits than its factorization.

551832138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12660 (or 12657 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 551832138 is about 23491.1076367208. The cubic root of 551832138 is about 820.2300256914.

The spelling of 551832138 in words is "five hundred fifty-one million, eight hundred thirty-two thousand, one hundred thirty-eight".