551100031 has 4 divisors (see below), whose sum is σ = 553149000. Its totient is φ = 549051064.

The previous prime is 551100023. The next prime is 551100071. The reversal of 551100031 is 130001155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130001155 = 5 ⋅26000231.

It is a cyclic number.

It is not a de Polignac number, because 551100031 - 2³ = 551100023 is a prime.

It is a super-2 number, since 2×551100031² = 607422488336401922, 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 = 551099978 and 551100014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551100001) 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, 1024081 + ... + 1024618.

It is an arithmetic number, because the mean of its divisors is an integer number (138287250).

Almost surely, 2^551100031 is an apocalyptic number.

551100031 is a deficient number, since it is larger than the sum of its proper divisors (2048969).

551100031 is a wasteful number, since it uses less digits than its factorization.

551100031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048968.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 551100031 is about 23475.5198238505. The cubic root of 551100031 is about 819.8671364151.

Adding to 551100031 its reverse (130001155), we get a palindrome (681101186).

The spelling of 551100031 in words is "five hundred fifty-one million, one hundred thousand, thirty-one".