55312047 has 18 divisors (see below), whose sum is σ = 91406328. Its totient is φ = 31573152.

The previous prime is 55312043. The next prime is 55312057. The reversal of 55312047 is 74021355.

It is a happy number.

It is not a de Polignac number, because 55312047 - 2² = 55312043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55312047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55312043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 58563 + ... + 59499.

Almost surely, 2^55312047 is an apocalyptic number.

55312047 is a deficient number, since it is larger than the sum of its proper divisors (36094281).

55312047 is an frugal number, since it uses more digits than its factorization.

55312047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887 (or 947 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 55312047 is about 7437.2069354026. The cubic root of 55312047 is about 381.0131022423.

The spelling of 55312047 in words is "fifty-five million, three hundred twelve thousand, forty-seven".