551435151321 has 32 divisors (see below), whose sum is σ = 818239403520. Its totient is φ = 367039631232.

The previous prime is 551435151313. The next prime is 551435151361. The reversal of 551435151321 is 123151534155.

551435151321 is a `hidden beast` number, since 5 + 5 + 1 + 4 + 3 + 515 + 132 + 1 = 666.

It is not a de Polignac number, because 551435151321 - 2³ = 551435151313 is a prime.

It is a super-2 number, since 2×551435151321² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (551435151361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50413765 + ... + 50424701.

It is an arithmetic number, because the mean of its divisors is an integer number (25569981360).

Almost surely, 2^551435151321 is an apocalyptic number.

It is an amenable number.

551435151321 is a deficient number, since it is larger than the sum of its proper divisors (266804252199).

551435151321 is a wasteful number, since it uses less digits than its factorization.

551435151321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13742 (or 13736 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

Adding to 551435151321 its reverse (123151534155), we get a palindrome (674586685476).

The spelling of 551435151321 in words is "five hundred fifty-one billion, four hundred thirty-five million, one hundred fifty-one thousand, three hundred twenty-one".