55140330321 has 12 divisors (see below), whose sum is σ = 79819920180. Its totient is φ = 36680477280.

The previous prime is 55140330277. The next prime is 55140330337. The reversal of 55140330321 is 12303304155.

55140330321 is a `hidden beast` number, since 5 + 5 + 1 + 4 + 0 + 330 + 321 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27229950225 + 27910380096 = 165015^2 + 167064^2 .

It is not a de Polignac number, because 55140330321 - 2⁶ = 55140330257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55140330121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6640866 + ... + 6649163.

It is an arithmetic number, because the mean of its divisors is an integer number (6651660015).

Almost surely, 2^55140330321 is an apocalyptic number.

It is an amenable number.

55140330321 is a deficient number, since it is larger than the sum of its proper divisors (24679589859).

55140330321 is a wasteful number, since it uses less digits than its factorization.

55140330321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13290496 (or 13290493 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 55140330321 its reverse (12303304155), we get a palindrome (67443634476).

The spelling of 55140330321 in words is "fifty-five billion, one hundred forty million, three hundred thirty thousand, three hundred twenty-one".