551235131 has 4 divisors (see below), whose sum is σ = 556113432. Its totient is φ = 546356832.

The previous prime is 551235109. The next prime is 551235133. The reversal of 551235131 is 131532155.

It is a happy number.

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 551235131 - 2²² = 547040827 is a prime.

It is a super-2 number, since 2×551235131² = 607720339297174322, 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 551235131.

It is not an unprimeable number, because it can be changed into a prime (551235133) 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, 2438981 + ... + 2439206.

It is an arithmetic number, because the mean of its divisors is an integer number (139028358).

Almost surely, 2^551235131 is an apocalyptic number.

551235131 is a deficient number, since it is larger than the sum of its proper divisors (4878301).

551235131 is a wasteful number, since it uses less digits than its factorization.

551235131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4878300.

The product of its digits is 2250, while the sum is 26.

The square root of 551235131 is about 23478.3971130910. The cubic root of 551235131 is about 819.9341266734.

Adding to 551235131 its reverse (131532155), we get a palindrome (682767286).

The spelling of 551235131 in words is "five hundred fifty-one million, two hundred thirty-five thousand, one hundred thirty-one".