55046987 has 4 divisors (see below), whose sum is σ = 55351296. Its totient is φ = 54742680.

The previous prime is 55046977. The next prime is 55047023. The reversal of 55046987 is 78964055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55046987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55046947) 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, 151883 + ... + 152244.

It is an arithmetic number, because the mean of its divisors is an integer number (13837824).

Almost surely, 2^55046987 is an apocalyptic number.

55046987 is a deficient number, since it is larger than the sum of its proper divisors (304309).

55046987 is a wasteful number, since it uses less digits than its factorization.

55046987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304308.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 55046987 is about 7419.3656736948. The cubic root of 55046987 is about 380.4035118132.

The spelling of 55046987 in words is "fifty-five million, forty-six thousand, nine hundred eighty-seven".