55921141 has 4 divisors (see below), whose sum is σ = 55975500. Its totient is φ = 55866784.

The previous prime is 55921133. The next prime is 55921147. The reversal of 55921141 is 14112955.

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 35354916 + 20566225 = 5946^2 + 4535^2 .

It is a cyclic number.

It is not a de Polignac number, because 55921141 - 2³ = 55921133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55921147) 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, 25606 + ... + 27703.

It is an arithmetic number, because the mean of its divisors is an integer number (13993875).

Almost surely, 2^55921141 is an apocalyptic number.

It is an amenable number.

55921141 is a deficient number, since it is larger than the sum of its proper divisors (54359).

55921141 is a wasteful number, since it uses less digits than its factorization.

55921141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54358.

The product of its digits is 1800, while the sum is 28.

The square root of 55921141 is about 7478.0439287290. The cubic root of 55921141 is about 382.4065666673.

The spelling of 55921141 in words is "fifty-five million, nine hundred twenty-one thousand, one hundred forty-one".