551022631 has 4 divisors (see below), whose sum is σ = 555044832. Its totient is φ = 547000432.

The previous prime is 551022601. The next prime is 551022671. The reversal of 551022631 is 136220155.

551022631 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, and also an emirpimes, since its reverse is a distinct semiprime: 136220155 = 5 ⋅27244031.

It is a cyclic number.

It is not a de Polignac number, because 551022631 - 2⁵ = 551022599 is a prime.

It is a super-2 number, since 2×551022631² = 607251879748324322, 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 = 551022596 and 551022605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551022601) 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, 2010895 + ... + 2011168.

It is an arithmetic number, because the mean of its divisors is an integer number (138761208).

Almost surely, 2^551022631 is an apocalyptic number.

551022631 is a deficient number, since it is larger than the sum of its proper divisors (4022201).

551022631 is a wasteful number, since it uses less digits than its factorization.

551022631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022200.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 551022631 is about 23473.8712401683. The cubic root of 551022631 is about 819.8287521631.

Adding to 551022631 its reverse (136220155), we get a palindrome (687242786).

The spelling of 551022631 in words is "five hundred fifty-one million, twenty-two thousand, six hundred thirty-one".