55039901 has 4 divisors (see below), whose sum is σ = 62902752. Its totient is φ = 47177052.

The previous prime is 55039813. The next prime is 55039909. The reversal of 55039901 is 10993055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55039901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55039909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3931415 + ... + 3931428.

It is an arithmetic number, because the mean of its divisors is an integer number (15725688).

Almost surely, 2^55039901 is an apocalyptic number.

It is an amenable number.

55039901 is a deficient number, since it is larger than the sum of its proper divisors (7862851).

55039901 is an equidigital number, since it uses as much as digits as its factorization.

55039901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7862850.

The product of its (nonzero) digits is 6075, while the sum is 32.

The square root of 55039901 is about 7418.8881242407. Note that the first 3 decimals coincide. The cubic root of 55039901 is about 380.3871884556.

The spelling of 55039901 in words is "fifty-five million, thirty-nine thousand, nine hundred one".