55142032431 has 4 divisors (see below), whose sum is σ = 73522709912. Its totient is φ = 36761354952.

The previous prime is 55142032423. The next prime is 55142032489. The reversal of 55142032431 is 13423024155.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55142032431 - 2³ = 55142032423 is a prime.

It is a super-2 number, since 2×55142032431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55142032831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9190338736 + ... + 9190338741.

It is an arithmetic number, because the mean of its divisors is an integer number (18380677478).

Almost surely, 2^55142032431 is an apocalyptic number.

55142032431 is a deficient number, since it is larger than the sum of its proper divisors (18380677481).

55142032431 is a wasteful number, since it uses less digits than its factorization.

55142032431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18380677480.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 55142032431 its reverse (13423024155), we get a palindrome (68565056586).

The spelling of 55142032431 in words is "fifty-five billion, one hundred forty-two million, thirty-two thousand, four hundred thirty-one".