55295987 has 4 divisors (see below), whose sum is σ = 55390776. Its totient is φ = 55201200.

The previous prime is 55295969. The next prime is 55295993. The reversal of 55295987 is 78959255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78959255 = 5 ⋅15791851.

It is a cyclic number.

It is not a de Polignac number, because 55295987 - 2⁸ = 55295731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55295287) 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 3 ways as a sum of consecutive naturals, for example, 46514 + ... + 47687.

It is an arithmetic number, because the mean of its divisors is an integer number (13847694).

Almost surely, 2^55295987 is an apocalyptic number.

55295987 is a deficient number, since it is larger than the sum of its proper divisors (94789).

55295987 is an equidigital number, since it uses as much as digits as its factorization.

55295987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94788.

The product of its digits is 1134000, while the sum is 50.

The square root of 55295987 is about 7436.1271506074. The cubic root of 55295987 is about 380.9762226167.

The spelling of 55295987 in words is "fifty-five million, two hundred ninety-five thousand, nine hundred eighty-seven".