53287081 has 4 divisors (see below), whose sum is σ = 53325952. Its totient is φ = 53248212.

The previous prime is 53287037. The next prime is 53287093. The reversal of 53287081 is 18078235.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a 3-Lehmer number, since φ(53287081) divides (53287081-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53287081 is a prime.

It is a super-2 number, since 2×53287081² = 5679026003001122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53282081) 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, 17301 + ... + 20146.

It is an arithmetic number, because the mean of its divisors is an integer number (13331488).

Almost surely, 2^53287081 is an apocalyptic number.

It is an amenable number.

53287081 is a deficient number, since it is larger than the sum of its proper divisors (38871).

53287081 is a wasteful number, since it uses less digits than its factorization.

53287081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38870.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 53287081 is about 7299.8000657552. The cubic root of 53287081 is about 376.3055673018.

The spelling of 53287081 in words is "fifty-three million, two hundred eighty-seven thousand, eighty-one".