551121697 has 8 divisors (see below), whose sum is σ = 646876736. Its totient is φ = 459622512.

The previous prime is 551121673. The next prime is 551121757. The reversal of 551121697 is 796121155.

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

It is a cyclic number.

It is not a de Polignac number, because 551121697 - 2¹⁵ = 551088929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551121097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1063683 + ... + 1064200.

It is an arithmetic number, because the mean of its divisors is an integer number (80859592).

Almost surely, 2^551121697 is an apocalyptic number.

It is an amenable number.

551121697 is a deficient number, since it is larger than the sum of its proper divisors (95755039).

551121697 is a wasteful number, since it uses less digits than its factorization.

551121697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127927.

The product of its digits is 18900, while the sum is 37.

The square root of 551121697 is about 23475.9812787453. The cubic root of 551121697 is about 819.8778803864.

The spelling of 551121697 in words is "five hundred fifty-one million, one hundred twenty-one thousand, six hundred ninety-seven".