53006491 has 4 divisors (see below), whose sum is σ = 53096472. Its totient is φ = 52916512.

The previous prime is 53006483. The next prime is 53006537. The reversal of 53006491 is 19460035.

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 53006491 - 2³ = 53006483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53006411) 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, 44101 + ... + 45286.

It is an arithmetic number, because the mean of its divisors is an integer number (13274118).

Almost surely, 2^53006491 is an apocalyptic number.

53006491 is a deficient number, since it is larger than the sum of its proper divisors (89981).

53006491 is an equidigital number, since it uses as much as digits as its factorization.

53006491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89980.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 53006491 is about 7280.5556793421. Note that the first 3 decimals coincide. The cubic root of 53006491 is about 375.6439094193.

The spelling of 53006491 in words is "fifty-three million, six thousand, four hundred ninety-one".