321131552055 has 16 divisors (see below), whose sum is σ = 531528086880. Its totient is φ = 165364293248.

The previous prime is 321131552033. The next prime is 321131552081. The reversal of 321131552055 is 550255131123.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 321131552055 - 2¹⁰ = 321131551031 is a prime.

It is a super-3 number, since 3×321131552055³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369116292 + ... + 369117161.

It is an arithmetic number, because the mean of its divisors is an integer number (33220505430).

Almost surely, 2^321131552055 is an apocalyptic number.

321131552055 is a deficient number, since it is larger than the sum of its proper divisors (210396534825).

321131552055 is a wasteful number, since it uses less digits than its factorization.

321131552055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738233490.

The product of its (nonzero) digits is 22500, while the sum is 33.

Adding to 321131552055 its reverse (550255131123), we get a palindrome (871386683178).

The spelling of 321131552055 in words is "three hundred twenty-one billion, one hundred thirty-one million, five hundred fifty-two thousand, fifty-five".