55047277 has 4 divisors (see below), whose sum is σ = 55063840. Its totient is φ = 55030716.

The previous prime is 55047271. The next prime is 55047281. The reversal of 55047277 is 77274055.

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, and also an emirpimes, since its reverse is a distinct semiprime: 77274055 = 5 ⋅15454811.

It is a cyclic number.

It is not a de Polignac number, because 55047277 - 2³ = 55047269 is a prime.

It is a super-2 number, since 2×55047277² = 6060405410229458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55047271) 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, 1377 + ... + 10582.

It is an arithmetic number, because the mean of its divisors is an integer number (13765960).

Almost surely, 2^55047277 is an apocalyptic number.

It is an amenable number.

55047277 is a deficient number, since it is larger than the sum of its proper divisors (16563).

55047277 is a wasteful number, since it uses less digits than its factorization.

55047277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16562.

The product of its (nonzero) digits is 68600, while the sum is 37.

The square root of 55047277 is about 7419.3852171187. The cubic root of 55047277 is about 380.4041798293.

The spelling of 55047277 in words is "fifty-five million, forty-seven thousand, two hundred seventy-seven".