55016431 has 4 divisors (see below), whose sum is σ = 55035592. Its totient is φ = 54997272.

The previous prime is 55016407. The next prime is 55016441. The reversal of 55016431 is 13461055.

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

It is a cyclic number.

It is not a de Polignac number, because 55016431 - 2⁵ = 55016399 is a prime.

It is a super-2 number, since 2×55016431² = 6053615359955522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 55016396 and 55016405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55016441) 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, 4305 + ... + 11338.

It is an arithmetic number, because the mean of its divisors is an integer number (13758898).

Almost surely, 2^55016431 is an apocalyptic number.

55016431 is a deficient number, since it is larger than the sum of its proper divisors (19161).

55016431 is a wasteful number, since it uses less digits than its factorization.

55016431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19160.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 55016431 is about 7417.3061821661. The cubic root of 55016431 is about 380.3331127976. Note that the first 3 decimals are identical.

Adding to 55016431 its reverse (13461055), we get a palindrome (68477486).

The spelling of 55016431 in words is "fifty-five million, sixteen thousand, four hundred thirty-one".