53515887 has 8 divisors (see below), whose sum is σ = 71388336. Its totient is φ = 35660352.

The previous prime is 53515879. The next prime is 53515901. The reversal of 53515887 is 78851535.

It is a happy number.

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

It is not a de Polignac number, because 53515887 - 2³ = 53515879 is a prime.

It is a super-2 number, since 2×53515887² = 5727900322793538, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53515807) 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, 9973 + ... + 14369.

It is an arithmetic number, because the mean of its divisors is an integer number (8923542).

Almost surely, 2^53515887 is an apocalyptic number.

53515887 is a deficient number, since it is larger than the sum of its proper divisors (17872449).

53515887 is a wasteful number, since it uses less digits than its factorization.

53515887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8457.

The product of its digits is 168000, while the sum is 42.

The square root of 53515887 is about 7315.4553515144. The cubic root of 53515887 is about 376.8433964132.

The spelling of 53515887 in words is "fifty-three million, five hundred fifteen thousand, eight hundred eighty-seven".