551205323153 has 4 divisors (see below), whose sum is σ = 551213671908. Its totient is φ = 551196974400.

The previous prime is 551205323143. The next prime is 551205323171. The reversal of 551205323153 is 351323502155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 351323502155 = 5 ⋅70264700431.

It can be written as a sum of positive squares in 2 ways, for example, as 157904506384 + 393300816769 = 397372^2 + 627137^2 .

It is a cyclic number.

It is not a de Polignac number, because 551205323153 - 2⁶ = 551205323089 is a prime.

It is a super-2 number, since 2×551205323153² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551205323143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4074548 + ... + 4207653.

It is an arithmetic number, because the mean of its divisors is an integer number (137803417977).

Almost surely, 2^551205323153 is an apocalyptic number.

It is an amenable number.

551205323153 is a deficient number, since it is larger than the sum of its proper divisors (8348755).

551205323153 is an equidigital number, since it uses as much as digits as its factorization.

551205323153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8348754.

The product of its (nonzero) digits is 67500, while the sum is 35.

The spelling of 551205323153 in words is "five hundred fifty-one billion, two hundred five million, three hundred twenty-three thousand, one hundred fifty-three".