551630406 has 16 divisors (see below), whose sum is σ = 1105886448. Its totient is φ = 183439200.

The previous prime is 551630383. The next prime is 551630407. The reversal of 551630406 is 604036155.

It is a super-2 number, since 2×551630406² = 608592209647449672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551630407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106665 + ... + 111716.

It is an arithmetic number, because the mean of its divisors is an integer number (69117903).

Almost surely, 2^551630406 is an apocalyptic number.

551630406 is an abundant number, since it is smaller than the sum of its proper divisors (554256042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551630406 is a wasteful number, since it uses less digits than its factorization.

551630406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218807.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 551630406 is about 23486.8134492528. The cubic root of 551630406 is about 820.1300636442.

The spelling of 551630406 in words is "five hundred fifty-one million, six hundred thirty thousand, four hundred six".