55087487 has 16 divisors (see below), whose sum is σ = 69636672. Its totient is φ = 42405120.

The previous prime is 55087471. The next prime is 55087519. The reversal of 55087487 is 78478055.

It is a cyclic number.

It is not a de Polignac number, because 55087487 - 2⁴ = 55087471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55087427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4814 + ... + 11547.

It is an arithmetic number, because the mean of its divisors is an integer number (4352292).

Almost surely, 2^55087487 is an apocalyptic number.

55087487 is a deficient number, since it is larger than the sum of its proper divisors (14549185).

55087487 is a wasteful number, since it uses less digits than its factorization.

55087487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16418.

The product of its (nonzero) digits is 313600, while the sum is 44.

The square root of 55087487 is about 7422.0945157011. The cubic root of 55087487 is about 380.4967810139.

The spelling of 55087487 in words is "fifty-five million, eighty-seven thousand, four hundred eighty-seven".