55431134521 has 16 divisors (see below), whose sum is σ = 66111784704. Its totient is φ = 45441437184.

The previous prime is 55431134467. The next prime is 55431134569. The reversal of 55431134521 is 12543113455.

It is a cyclic number.

It is not a de Polignac number, because 55431134521 - 2¹⁷ = 55431003449 is a prime.

It is a super-2 number, since 2×55431134521² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55431134581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2085105 + ... + 2111521.

It is an arithmetic number, because the mean of its divisors is an integer number (4131986544).

Almost surely, 2^55431134521 is an apocalyptic number.

It is an amenable number.

55431134521 is a deficient number, since it is larger than the sum of its proper divisors (10680650183).

55431134521 is a wasteful number, since it uses less digits than its factorization.

55431134521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39480.

The product of its digits is 36000, while the sum is 34.

Adding to 55431134521 its reverse (12543113455), we get a palindrome (67974247976).

The spelling of 55431134521 in words is "fifty-five billion, four hundred thirty-one million, one hundred thirty-four thousand, five hundred twenty-one".