55085973 has 4 divisors (see below), whose sum is σ = 73447968. Its totient is φ = 36723980.

The previous prime is 55085971. The next prime is 55085983. The reversal of 55085973 is 37958055.

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 not a de Polignac number, because 55085973 - 2¹ = 55085971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55085971) 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, 9180993 + ... + 9180998.

It is an arithmetic number, because the mean of its divisors is an integer number (18361992).

Almost surely, 2^55085973 is an apocalyptic number.

It is an amenable number.

55085973 is a deficient number, since it is larger than the sum of its proper divisors (18361995).

55085973 is a wasteful number, since it uses less digits than its factorization.

55085973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18361994.

The product of its (nonzero) digits is 189000, while the sum is 42.

The square root of 55085973 is about 7421.9925222274. The cubic root of 55085973 is about 380.4932951805.

The spelling of 55085973 in words is "fifty-five million, eighty-five thousand, nine hundred seventy-three".