551504121 has 8 divisors (see below), whose sum is σ = 840387264. Its totient is φ = 315145200.

The previous prime is 551504087. The next prime is 551504131. The reversal of 551504121 is 121405155.

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

It is not a de Polignac number, because 551504121 - 2¹⁷ = 551373049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 551504091 and 551504100.

It is not an unprimeable number, because it can be changed into a prime (551504131) 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, 13131030 + ... + 13131071.

It is an arithmetic number, because the mean of its divisors is an integer number (105048408).

Almost surely, 2^551504121 is an apocalyptic number.

It is an amenable number.

551504121 is a deficient number, since it is larger than the sum of its proper divisors (288883143).

551504121 is a wasteful number, since it uses less digits than its factorization.

551504121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26262111.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 551504121 is about 23484.1248719215. The cubic root of 551504121 is about 820.0674746182.

Adding to 551504121 its reverse (121405155), we get a palindrome (672909276).

The spelling of 551504121 in words is "five hundred fifty-one million, five hundred four thousand, one hundred twenty-one".