551313131 has 4 divisors (see below), whose sum is σ = 551409432. Its totient is φ = 551216832.

The previous prime is 551313109. The next prime is 551313137. The reversal of 551313131 is 131313155.

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 551313131 - 2⁶ = 551313067 is a prime.

It is a super-2 number, since 2×551313131² = 607892336826046322, 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 = 551313097 and 551313106.

It is not an unprimeable number, because it can be changed into a prime (551313137) 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, 38981 + ... + 51206.

It is an arithmetic number, because the mean of its divisors is an integer number (137852358).

Almost surely, 2^551313131 is an apocalyptic number.

551313131 is a deficient number, since it is larger than the sum of its proper divisors (96301).

551313131 is an equidigital number, since it uses as much as digits as its factorization.

551313131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96300.

The product of its digits is 675, while the sum is 23.

The square root of 551313131 is about 23480.0581558053. The cubic root of 551313131 is about 819.9727985226.

Adding to 551313131 its reverse (131313155), we get a palindrome (682626286).

The spelling of 551313131 in words is "five hundred fifty-one million, three hundred thirteen thousand, one hundred thirty-one".