551641630 has 32 divisors (see below), whose sum is σ = 1046568960. Its totient is φ = 208772640.

The previous prime is 551641583. The next prime is 551641631. The reversal of 551641630 is 36146155.

It is a junction number, because it is equal to n+sod(n) for n = 551641592 and 551641601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551641631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205195 + ... + 207865.

It is an arithmetic number, because the mean of its divisors is an integer number (32705280).

Almost surely, 2^551641630 is an apocalyptic number.

551641630 is a deficient number, since it is larger than the sum of its proper divisors (494927330).

551641630 is a wasteful number, since it uses less digits than its factorization.

551641630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3784.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 551641630 is about 23487.0523906258. The cubic root of 551641630 is about 820.1356259901.

Adding to 551641630 its reverse (36146155), we get a palindrome (587787785).

The spelling of 551641630 in words is "five hundred fifty-one million, six hundred forty-one thousand, six hundred thirty".