551106405631 has 4 divisors (see below), whose sum is σ = 554616637672. Its totient is φ = 547596173592.

The previous prime is 551106405623. The next prime is 551106405649. The reversal of 551106405631 is 136504601155.

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 551106405631 - 2³ = 551106405623 is a prime.

It is a super-2 number, since 2×551106405631² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551106405601) 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, 1755115785 + ... + 1755116098.

It is an arithmetic number, because the mean of its divisors is an integer number (138654159418).

Almost surely, 2^551106405631 is an apocalyptic number.

551106405631 is a deficient number, since it is larger than the sum of its proper divisors (3510232041).

551106405631 is a wasteful number, since it uses less digits than its factorization.

551106405631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3510232040.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 551106405631 in words is "five hundred fifty-one billion, one hundred six million, four hundred five thousand, six hundred thirty-one".