55625239 has 2 divisors, whose sum is σ = 55625240. Its totient is φ = 55625238.

The previous prime is 55625237. The next prime is 55625279. The reversal of 55625239 is 93252655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55625239 - 2¹ = 55625237 is a prime.

Together with 55625237, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 55625198 and 55625207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55625231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27812619 + 27812620.

It is an arithmetic number, because the mean of its divisors is an integer number (27812620).

Almost surely, 2^55625239 is an apocalyptic number.

55625239 is a deficient number, since it is larger than the sum of its proper divisors (1).

55625239 is an equidigital number, since it uses as much as digits as its factorization.

55625239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 37.

The square root of 55625239 is about 7458.2329676673. The cubic root of 55625239 is about 381.7308827917.

It can be divided in two parts, 5562 and 5239, that added together give a palindrome (10801).

The spelling of 55625239 in words is "fifty-five million, six hundred twenty-five thousand, two hundred thirty-nine".