55236439 has 4 divisors (see below), whose sum is σ = 58143640. Its totient is φ = 52329240.

The previous prime is 55236437. The next prime is 55236443. The reversal of 55236439 is 93463255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93463255 = 5 ⋅18692651.

It is a cyclic number.

It is not a de Polignac number, because 55236439 - 2¹ = 55236437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55236398 and 55236407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55236437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1453572 + ... + 1453609.

It is an arithmetic number, because the mean of its divisors is an integer number (14535910).

Almost surely, 2^55236439 is an apocalyptic number.

55236439 is a deficient number, since it is larger than the sum of its proper divisors (2907201).

55236439 is a wasteful number, since it uses less digits than its factorization.

55236439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2907200.

The product of its digits is 97200, while the sum is 37.

The square root of 55236439 is about 7432.1221061013. The cubic root of 55236439 is about 380.8394163020.

The spelling of 55236439 in words is "fifty-five million, two hundred thirty-six thousand, four hundred thirty-nine".