551120129 has 16 divisors (see below), whose sum is σ = 648984960. Its totient is φ = 458240640.

The previous prime is 551120123. The next prime is 551120149. The reversal of 551120129 is 921021155.

It is a cyclic number.

It is not a de Polignac number, because 551120129 - 2⁴ = 551120113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551120098 and 551120107.

It is not an unprimeable number, because it can be changed into a prime (551120123) 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, 24674 + ... + 41364.

It is an arithmetic number, because the mean of its divisors is an integer number (40561560).

Almost surely, 2^551120129 is an apocalyptic number.

It is an amenable number.

551120129 is a deficient number, since it is larger than the sum of its proper divisors (97864831).

551120129 is a wasteful number, since it uses less digits than its factorization.

551120129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16840.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 551120129 is about 23475.9478828864. The cubic root of 551120129 is about 819.8771028389.

The spelling of 551120129 in words is "five hundred fifty-one million, one hundred twenty thousand, one hundred twenty-nine".