551233631 has 4 divisors (see below), whose sum is σ = 593636232. Its totient is φ = 508831032.

The previous prime is 551233621. The next prime is 551233667. The reversal of 551233631 is 136332155.

551233631 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 a de Polignac number, because none of the positive numbers 2^k-551233631 is a prime.

It is a super-2 number, since 2×551233631² = 607717031890888322, 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 = 551233594 and 551233603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551233621) 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, 21201281 + ... + 21201306.

It is an arithmetic number, because the mean of its divisors is an integer number (148409058).

Almost surely, 2^551233631 is an apocalyptic number.

551233631 is a deficient number, since it is larger than the sum of its proper divisors (42402601).

551233631 is a wasteful number, since it uses less digits than its factorization.

551233631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42402600.

The product of its digits is 8100, while the sum is 29.

The square root of 551233631 is about 23478.3651688102. The cubic root of 551233631 is about 819.9333829483.

Adding to 551233631 its reverse (136332155), we get a palindrome (687565786).

The spelling of 551233631 in words is "five hundred fifty-one million, two hundred thirty-three thousand, six hundred thirty-one".