55029239 has 4 divisors (see below), whose sum is σ = 55085760. Its totient is φ = 54972720.

The previous prime is 55029203. The next prime is 55029251. The reversal of 55029239 is 93292055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93292055 = 5 ⋅18658411.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55029239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55029199 and 55029208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55029439) 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, 26774 + ... + 28755.

It is an arithmetic number, because the mean of its divisors is an integer number (13771440).

Almost surely, 2^55029239 is an apocalyptic number.

55029239 is a deficient number, since it is larger than the sum of its proper divisors (56521).

55029239 is an equidigital number, since it uses as much as digits as its factorization.

55029239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56520.

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

The square root of 55029239 is about 7418.1695181493. The cubic root of 55029239 is about 380.3626247601.

It can be divided in two parts, 5502 and 9239, that added together give a palindrome (14741).

The spelling of 55029239 in words is "fifty-five million, twenty-nine thousand, two hundred thirty-nine".