55016639 has 2 divisors, whose sum is σ = 55016640. Its totient is φ = 55016638.

The previous prime is 55016623. The next prime is 55016653. The reversal of 55016639 is 93661055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55016639 - 2⁴ = 55016623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55016599 and 55016608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55016239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27508319 + 27508320.

It is an arithmetic number, because the mean of its divisors is an integer number (27508320).

Almost surely, 2^55016639 is an apocalyptic number.

55016639 is a deficient number, since it is larger than the sum of its proper divisors (1).

55016639 is an equidigital number, since it uses as much as digits as its factorization.

55016639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 55016639 is about 7417.3202034158. The cubic root of 55016639 is about 380.3335921040. Note that the first 3 decimals are identical.

It can be divided in two parts, 55016 and 639, that added together give a palindrome (55655).

The spelling of 55016639 in words is "fifty-five million, sixteen thousand, six hundred thirty-nine".