55650139 has 4 divisors (see below), whose sum is σ = 55752424. Its totient is φ = 55547856.

The previous prime is 55650073. The next prime is 55650143. The reversal of 55650139 is 93105655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55650139 - 2¹¹ = 55648091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55650149) 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, 50322 + ... + 51415.

It is an arithmetic number, because the mean of its divisors is an integer number (13938106).

Almost surely, 2^55650139 is an apocalyptic number.

55650139 is a deficient number, since it is larger than the sum of its proper divisors (102285).

55650139 is a wasteful number, since it uses less digits than its factorization.

55650139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102284.

The product of its (nonzero) digits is 20250, while the sum is 34.

The square root of 55650139 is about 7459.9020771053. The cubic root of 55650139 is about 381.7878334447.

The spelling of 55650139 in words is "fifty-five million, six hundred fifty thousand, one hundred thirty-nine".