551505121303 has 8 divisors (see below), whose sum is σ = 568884082880. Its totient is φ = 534256339680.

The previous prime is 551505121253. The next prime is 551505121367. The reversal of 551505121303 is 303121505155.

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 551505121303 - 2³⁷ = 414066167831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551505121003) 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, 32536383 + ... + 32553328.

It is an arithmetic number, because the mean of its divisors is an integer number (71110510360).

Almost surely, 2^551505121303 is an apocalyptic number.

551505121303 is a deficient number, since it is larger than the sum of its proper divisors (17378961577).

551505121303 is a wasteful number, since it uses less digits than its factorization.

551505121303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65089977.

The product of its (nonzero) digits is 11250, while the sum is 31.

Adding to 551505121303 its reverse (303121505155), we get a palindrome (854626626458).

The spelling of 551505121303 in words is "five hundred fifty-one billion, five hundred five million, one hundred twenty-one thousand, three hundred three".