551241985 has 16 divisors (see below), whose sum is σ = 757397376. Its totient is φ = 377290368.

The previous prime is 551241973. The next prime is 551241997. The reversal of 551241985 is 589142155.

It is an interprime number because it is at equal distance from previous prime (551241973) and next prime (551241997).

It is not a de Polignac number, because 551241985 - 2⁵ = 551241953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4749 + ... + 33541.

It is an arithmetic number, because the mean of its divisors is an integer number (47337336).

Almost surely, 2^551241985 is an apocalyptic number.

It is an amenable number.

551241985 is a deficient number, since it is larger than the sum of its proper divisors (206155391).

551241985 is a wasteful number, since it uses less digits than its factorization.

551241985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29352.

The product of its digits is 72000, while the sum is 40.

The square root of 551241985 is about 23478.5430766051. The cubic root of 551241985 is about 819.9375249844.

The spelling of 551241985 in words is "five hundred fifty-one million, two hundred forty-one thousand, nine hundred eighty-five".