53015887 has 4 divisors (see below), whose sum is σ = 53069440. Its totient is φ = 52962336.

The previous prime is 53015867. The next prime is 53015899. The reversal of 53015887 is 78851035.

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-53015887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53015867) 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, 25263 + ... + 27280.

It is an arithmetic number, because the mean of its divisors is an integer number (13267360).

Almost surely, 2^53015887 is an apocalyptic number.

53015887 is a deficient number, since it is larger than the sum of its proper divisors (53553).

53015887 is a wasteful number, since it uses less digits than its factorization.

53015887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53552.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 53015887 is about 7281.2009311651. The cubic root of 53015887 is about 375.6661038184. Note that the first 3 decimals are identical.

The spelling of 53015887 in words is "fifty-three million, fifteen thousand, eight hundred eighty-seven".