551381229 has 16 divisors (see below), whose sum is σ = 933555840. Its totient is φ = 315074880.

The previous prime is 551381209. The next prime is 551381251. The reversal of 551381229 is 922183155.

551381229 is a `hidden beast` number, since 5 + 51 + 381 + 229 = 666.

It is not a de Polignac number, because 551381229 - 2⁹ = 551380717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 551381193 and 551381202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551381209) 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, 1458492 + ... + 1458869.

It is an arithmetic number, because the mean of its divisors is an integer number (58347240).

Almost surely, 2^551381229 is an apocalyptic number.

It is an amenable number.

551381229 is a deficient number, since it is larger than the sum of its proper divisors (382174611).

551381229 is a wasteful number, since it uses less digits than its factorization.

551381229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917377 (or 2917371 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 551381229 is about 23481.5082352050. The cubic root of 551381229 is about 820.0065580479.

The spelling of 551381229 in words is "five hundred fifty-one million, three hundred eighty-one thousand, two hundred twenty-nine".