52081493 has 4 divisors (see below), whose sum is σ = 52456320. Its totient is φ = 51706668.

The previous prime is 52081487. The next prime is 52081507. The reversal of 52081493 is 39418025.

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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52081493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52081423) 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, 187205 + ... + 187482.

It is an arithmetic number, because the mean of its divisors is an integer number (13114080).

Almost surely, 2^52081493 is an apocalyptic number.

It is an amenable number.

52081493 is a deficient number, since it is larger than the sum of its proper divisors (374827).

52081493 is a wasteful number, since it uses less digits than its factorization.

52081493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374826.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 52081493 is about 7216.7508617106. The cubic root of 52081493 is about 373.4459969461.

The spelling of 52081493 in words is "fifty-two million, eighty-one thousand, four hundred ninety-three".