55723149 has 6 divisors (see below), whose sum is σ = 80489006. Its totient is φ = 37148760.

The previous prime is 55723091. The next prime is 55723159. The reversal of 55723149 is 94132755.

It can be written as a sum of positive squares in only one way, i.e., 55398249 + 324900 = 7443^2 + 570^2 .

It is not a de Polignac number, because 55723149 - 2⁹ = 55722637 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 (55723159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3095722 + ... + 3095739.

Almost surely, 2^55723149 is an apocalyptic number.

It is an amenable number.

55723149 is a deficient number, since it is larger than the sum of its proper divisors (24765857).

55723149 is a wasteful number, since it uses less digits than its factorization.

55723149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6191467 (or 6191464 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 55723149 is about 7464.7939690255. The cubic root of 55723149 is about 381.9547222086.

The spelling of 55723149 in words is "fifty-five million, seven hundred twenty-three thousand, one hundred forty-nine".