551242521 has 12 divisors (see below), whose sum is σ = 796443648. Its totient is φ = 367400664.

The previous prime is 551242519. The next prime is 551242553. The reversal of 551242521 is 125242155.

It is not a de Polignac number, because 551242521 - 2¹ = 551242519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551243521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59616 + ... + 68238.

It is an arithmetic number, because the mean of its divisors is an integer number (66370304).

Almost surely, 2^551242521 is an apocalyptic number.

It is an amenable number.

551242521 is a deficient number, since it is larger than the sum of its proper divisors (245201127).

551242521 is a wasteful number, since it uses less digits than its factorization.

551242521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15732 (or 15729 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 551242521 is about 23478.5544912799. The cubic root of 551242521 is about 819.9377907397.

Adding to 551242521 its reverse (125242155), we get a palindrome (676484676).

The spelling of 551242521 in words is "five hundred fifty-one million, two hundred forty-two thousand, five hundred twenty-one".