55140021221313 has 36 divisors (see below), whose sum is σ = 87381659221872. Its totient is φ = 30838187978640.

The previous prime is 55140021221291. The next prime is 55140021221317. The reversal of 55140021221313 is 31312212004155.

It is a happy number.

It is not a de Polignac number, because 55140021221313 - 2⁵ = 55140021221281 is a prime.

It is a super-3 number, since 3×55140021221313³ (a number of 42 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (55140021221317) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 84578443 + ... + 85227888.

Almost surely, 2^{55140021221313} is an apocalyptic number.

It is an amenable number.

55140021221313 is a deficient number, since it is larger than the sum of its proper divisors (32241638000559).

55140021221313 is a wasteful number, since it uses less digits than its factorization.

55140021221313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169806442 (or 169806388 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 55140021221313 its reverse (31312212004155), we get a palindrome (86452233225468).

The spelling of 55140021221313 in words is "fifty-five trillion, one hundred forty billion, twenty-one million, two hundred twenty-one thousand, three hundred thirteen".