551421612 has 36 divisors (see below), whose sum is σ = 1592996496. Its totient is φ = 157548960.

The previous prime is 551421601. The next prime is 551421613. The reversal of 551421612 is 216124155.

551421612 is a `hidden beast` number, since 5 + 5 + 1 + 42 + 1 + 612 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (551421613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1093839 + ... + 1094342.

Almost surely, 2^551421612 is an apocalyptic number.

It is an amenable number.

551421612 is an abundant number, since it is smaller than the sum of its proper divisors (1041574884).

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

551421612 is a wasteful number, since it uses less digits than its factorization.

551421612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188198 (or 2188193 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 551421612 is about 23482.3681088599. The cubic root of 551421612 is about 820.0265765727.

Adding to 551421612 its reverse (216124155), we get a palindrome (767545767).

The spelling of 551421612 in words is "five hundred fifty-one million, four hundred twenty-one thousand, six hundred twelve".