55406773 has 4 divisors (see below), whose sum is σ = 55811340. Its totient is φ = 55002208.

The previous prime is 55406731. The next prime is 55406777. The reversal of 55406773 is 37760455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37760455 = 5 ⋅7552091.

It can be written as a sum of positive squares in 2 ways, for example, as 33663204 + 21743569 = 5802^2 + 4663^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55406773 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 (55406777) 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, 202078 + ... + 202351.

It is an arithmetic number, because the mean of its divisors is an integer number (13952835).

Almost surely, 2^55406773 is an apocalyptic number.

It is an amenable number.

55406773 is a deficient number, since it is larger than the sum of its proper divisors (404567).

55406773 is a wasteful number, since it uses less digits than its factorization.

55406773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404566.

The product of its (nonzero) digits is 88200, while the sum is 37.

The square root of 55406773 is about 7443.5725965426. The cubic root of 55406773 is about 381.2304826343.

The spelling of 55406773 in words is "fifty-five million, four hundred six thousand, seven hundred seventy-three".