55772047 has 4 divisors (see below), whose sum is σ = 55858896. Its totient is φ = 55685200.

The previous prime is 55772027. The next prime is 55772063. The reversal of 55772047 is 74027755.

55772047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55772047 - 2¹¹ = 55769999 is a prime.

It is a super-2 number, since 2×55772047² = 6221042453140418, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55771997 and 55772015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55772027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42454 + ... + 43747.

It is an arithmetic number, because the mean of its divisors is an integer number (13964724).

Almost surely, 2^55772047 is an apocalyptic number.

55772047 is a deficient number, since it is larger than the sum of its proper divisors (86849).

55772047 is an equidigital number, since it uses as much as digits as its factorization.

55772047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86848.

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

The square root of 55772047 is about 7468.0684919194. The cubic root of 55772047 is about 382.0664134412.

The spelling of 55772047 in words is "fifty-five million, seven hundred seventy-two thousand, forty-seven".