53006881 has 4 divisors (see below), whose sum is σ = 55311552. Its totient is φ = 50702212.

The previous prime is 53006857. The next prime is 53006897. The reversal of 53006881 is 18860035.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18860035 = 5 ⋅3772007.

It is not a de Polignac number, because 53006881 - 2⁷ = 53006753 is a prime.

It is a super-2 number, since 2×53006881² = 5619458866696322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53006851) 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, 1152301 + ... + 1152346.

It is an arithmetic number, because the mean of its divisors is an integer number (13827888).

Almost surely, 2^53006881 is an apocalyptic number.

It is an amenable number.

53006881 is a deficient number, since it is larger than the sum of its proper divisors (2304671).

53006881 is a wasteful number, since it uses less digits than its factorization.

53006881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304670.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 53006881 is about 7280.5824629627. The cubic root of 53006881 is about 375.6448306949.

The spelling of 53006881 in words is "fifty-three million, six thousand, eight hundred eighty-one".