55431321011 has 6 divisors (see below), whose sum is σ = 60928642236. Its totient is φ = 50392109900.

The previous prime is 55431320951. The next prime is 55431321019. The reversal of 55431321011 is 11012313455.

It is not a de Polignac number, because 55431321011 - 2⁶ = 55431320947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55431321019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 229054925 + ... + 229055166.

It is an arithmetic number, because the mean of its divisors is an integer number (10154773706).

Almost surely, 2^55431321011 is an apocalyptic number.

55431321011 is a deficient number, since it is larger than the sum of its proper divisors (5497321225).

55431321011 is a wasteful number, since it uses less digits than its factorization.

55431321011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458110113 (or 458110102 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 55431321011 its reverse (11012313455), we get a palindrome (66443634466).

The spelling of 55431321011 in words is "fifty-five billion, four hundred thirty-one million, three hundred twenty-one thousand, eleven".