551681449 has 8 divisors (see below), whose sum is σ = 602005248. Its totient is φ = 501386160.

The previous prime is 551681423. The next prime is 551681453. The reversal of 551681449 is 944186155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 551681449 - 2¹³ = 551673257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551681419) 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, 66099 + ... + 73975.

It is an arithmetic number, because the mean of its divisors is an integer number (75250656).

Almost surely, 2^551681449 is an apocalyptic number.

It is an amenable number.

551681449 is a deficient number, since it is larger than the sum of its proper divisors (50323799).

551681449 is a wasteful number, since it uses less digits than its factorization.

551681449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14255.

The product of its digits is 172800, while the sum is 43.

The square root of 551681449 is about 23487.9000551348. The cubic root of 551681449 is about 820.1553587254.

The spelling of 551681449 in words is "five hundred fifty-one million, six hundred eighty-one thousand, four hundred forty-nine".