55135401321 has 32 divisors (see below), whose sum is σ = 98703940608. Its totient is φ = 26438552640.

The previous prime is 55135401301. The next prime is 55135401331. The reversal of 55135401321 is 12310453155.

It is not a de Polignac number, because 55135401321 - 2⁵ = 55135401289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55135401301) 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, 9177051 + ... + 9183056.

It is an arithmetic number, because the mean of its divisors is an integer number (3084498144).

Almost surely, 2^55135401321 is an apocalyptic number.

It is an amenable number.

55135401321 is a deficient number, since it is larger than the sum of its proper divisors (43568539287).

55135401321 is a wasteful number, since it uses less digits than its factorization.

55135401321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18360141.

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 55135401321 its reverse (12310453155), we get a palindrome (67445854476).

The spelling of 55135401321 in words is "fifty-five billion, one hundred thirty-five million, four hundred one thousand, three hundred twenty-one".