53087831 has 4 divisors (see below), whose sum is σ = 53209200. Its totient is φ = 52966464.

The previous prime is 53087807. The next prime is 53087833. The reversal of 53087831 is 13878035.

53087831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 53087831 - 2¹⁰ = 53086807 is a prime.

It is a super-2 number, since 2×53087831² = 5636635600569122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53087791 and 53087800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53087833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60026 + ... + 60903.

It is an arithmetic number, because the mean of its divisors is an integer number (13302300).

Almost surely, 2^53087831 is an apocalyptic number.

53087831 is a deficient number, since it is larger than the sum of its proper divisors (121369).

53087831 is a wasteful number, since it uses less digits than its factorization.

53087831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121368.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 53087831 is about 7286.1396500479. The cubic root of 53087831 is about 375.8359567152.

The spelling of 53087831 in words is "fifty-three million, eighty-seven thousand, eight hundred thirty-one".