551071201521 has 8 divisors (see below), whose sum is σ = 739441612864. Its totient is φ = 365040795600.

The previous prime is 551071201487. The next prime is 551071201529. The reversal of 551071201521 is 125102170155.

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

It is not a de Polignac number, because 551071201521 - 2⁷ = 551071201393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551071201529) 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, 585000805 + ... + 585001746.

It is an arithmetic number, because the mean of its divisors is an integer number (92430201608).

Almost surely, 2^551071201521 is an apocalyptic number.

It is an amenable number.

551071201521 is a deficient number, since it is larger than the sum of its proper divisors (188370411343).

551071201521 is a wasteful number, since it uses less digits than its factorization.

551071201521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170002711.

The product of its (nonzero) digits is 3500, while the sum is 30.

Adding to 551071201521 its reverse (125102170155), we get a palindrome (676173371676).

The spelling of 551071201521 in words is "five hundred fifty-one billion, seventy-one million, two hundred one thousand, five hundred twenty-one".