55391801 has 4 divisors (see below), whose sum is σ = 55731792. Its totient is φ = 55051812.

The previous prime is 55391773. The next prime is 55391851. The reversal of 55391801 is 10819355.

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-55391801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55391851) 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, 169751 + ... + 170076.

It is an arithmetic number, because the mean of its divisors is an integer number (13932948).

Almost surely, 2^55391801 is an apocalyptic number.

It is an amenable number.

55391801 is a deficient number, since it is larger than the sum of its proper divisors (339991).

55391801 is a wasteful number, since it uses less digits than its factorization.

55391801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339990.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 55391801 is about 7442.5668287225. The cubic root of 55391801 is about 381.1961408822.

The spelling of 55391801 in words is "fifty-five million, three hundred ninety-one thousand, eight hundred one".