55135487 has 8 divisors (see below), whose sum is σ = 60220800. Its totient is φ = 50062360.

The previous prime is 55135469. The next prime is 55135499. The reversal of 55135487 is 78453155.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55135487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55135487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55135427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8264 + ... + 13362.

It is an arithmetic number, because the mean of its divisors is an integer number (7527600).

Almost surely, 2^55135487 is an apocalyptic number.

55135487 is a deficient number, since it is larger than the sum of its proper divisors (5085313).

55135487 is a wasteful number, since it uses less digits than its factorization.

55135487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6093.

The product of its digits is 84000, while the sum is 38.

The square root of 55135487 is about 7425.3274001892. The cubic root of 55135487 is about 380.6072631117.

The spelling of 55135487 in words is "fifty-five million, one hundred thirty-five thousand, four hundred eighty-seven".