55012987 has 8 divisors (see below), whose sum is σ = 57565440. Its totient is φ = 52473960.

The previous prime is 55012949. The next prime is 55013009. The reversal of 55012987 is 78921055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55012987 - 2¹⁹ = 54488699 is a prime.

It is a Duffinian number.

55012987 is a modest number, since divided by 12987 gives 55 as remainder.

It is not an unprimeable number, because it can be changed into a prime (55012907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5562 + ... + 11872.

It is an arithmetic number, because the mean of its divisors is an integer number (7195680).

Almost surely, 2^55012987 is an apocalyptic number.

55012987 is a deficient number, since it is larger than the sum of its proper divisors (2552453).

55012987 is a wasteful number, since it uses less digits than its factorization.

55012987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6713.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 55012987 is about 7417.0740187759. The cubic root of 55012987 is about 380.3251764136.

The spelling of 55012987 in words is "fifty-five million, twelve thousand, nine hundred eighty-seven".