55919901 has 4 divisors (see below), whose sum is σ = 74559872. Its totient is φ = 37279932.

The previous prime is 55919893. The next prime is 55919947. The reversal of 55919901 is 10991955.

55919901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 55919901 - 2³ = 55919893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55919901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55919401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9319981 + ... + 9319986.

It is an arithmetic number, because the mean of its divisors is an integer number (18639968).

Almost surely, 2^55919901 is an apocalyptic number.

It is an amenable number.

55919901 is a deficient number, since it is larger than the sum of its proper divisors (18639971).

55919901 is a wasteful number, since it uses less digits than its factorization.

55919901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18639970.

The product of its (nonzero) digits is 18225, while the sum is 39.

The square root of 55919901 is about 7477.9610188874. The cubic root of 55919901 is about 382.4037401414.

The spelling of 55919901 in words is "fifty-five million, nine hundred nineteen thousand, nine hundred one".