551312431 has 4 divisors (see below), whose sum is σ = 583742592. Its totient is φ = 518882272.

The previous prime is 551312429. The next prime is 551312441. The reversal of 551312431 is 134213155.

It is a happy number.

551312431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 551312431 - 2¹ = 551312429 is a prime.

It is a super-2 number, since 2×551312431² = 607890793150259522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551312396 and 551312405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551312441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16215055 + ... + 16215088.

It is an arithmetic number, because the mean of its divisors is an integer number (145935648).

Almost surely, 2^551312431 is an apocalyptic number.

551312431 is a deficient number, since it is larger than the sum of its proper divisors (32430161).

551312431 is a wasteful number, since it uses less digits than its factorization.

551312431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32430160.

The product of its digits is 1800, while the sum is 25.

The square root of 551312431 is about 23480.0432495343. The cubic root of 551312431 is about 819.9724514838.

Adding to 551312431 its reverse (134213155), we get a palindrome (685525586).

It can be divided in two parts, 5513124 and 31, that added together give a palindrome (5513155).

The spelling of 551312431 in words is "five hundred fifty-one million, three hundred twelve thousand, four hundred thirty-one".