55380029 has 4 divisors (see below), whose sum is σ = 55557276. Its totient is φ = 55202784.

The previous prime is 55380019. The next prime is 55380047. The reversal of 55380029 is 92008355.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23716900 + 31663129 = 4870^2 + 5627^2 .

It is a cyclic number.

It is not a de Polignac number, because 55380029 - 2⁸ = 55379773 is a prime.

It is a super-2 number, since 2×55380029² = 6133895224081682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55379977 and 55380004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55380019) 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, 88154 + ... + 88779.

It is an arithmetic number, because the mean of its divisors is an integer number (13889319).

Almost surely, 2^55380029 is an apocalyptic number.

It is an amenable number.

55380029 is a deficient number, since it is larger than the sum of its proper divisors (177247).

55380029 is a wasteful number, since it uses less digits than its factorization.

55380029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177246.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 55380029 is about 7441.7759305155. The cubic root of 55380029 is about 381.1691347260.

The spelling of 55380029 in words is "fifty-five million, three hundred eighty thousand, twenty-nine".