551304631 has 4 divisors (see below), whose sum is σ = 554687032. Its totient is φ = 547922232.

The previous prime is 551304613. The next prime is 551304647. The reversal of 551304631 is 136403155.

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

It is a cyclic number.

It is not a de Polignac number, because 551304631 - 2¹⁹ = 550780343 is a prime.

It is a super-2 number, since 2×551304631² = 607873592324092322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 551304631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551304331) 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, 1690956 + ... + 1691281.

It is an arithmetic number, because the mean of its divisors is an integer number (138671758).

Almost surely, 2^551304631 is an apocalyptic number.

551304631 is a deficient number, since it is larger than the sum of its proper divisors (3382401).

551304631 is a wasteful number, since it uses less digits than its factorization.

551304631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3382400.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 551304631 is about 23479.8771504452. The cubic root of 551304631 is about 819.9685844597.

Adding to 551304631 its reverse (136403155), we get a palindrome (687707786).

The spelling of 551304631 in words is "five hundred fifty-one million, three hundred four thousand, six hundred thirty-one".