51527993 has 8 divisors (see below), whose sum is σ = 56300160. Its totient is φ = 46770480.

The previous prime is 51527989. The next prime is 51528007. The reversal of 51527993 is 39972515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51527993 - 2² = 51527989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51527993.

It is not an unprimeable number, because it can be changed into a prime (51527923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4496 + ... + 11102.

It is an arithmetic number, because the mean of its divisors is an integer number (7037520).

Almost surely, 2^51527993 is an apocalyptic number.

It is an amenable number.

51527993 is a deficient number, since it is larger than the sum of its proper divisors (4772167).

51527993 is a wasteful number, since it uses less digits than its factorization.

51527993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7327.

The product of its digits is 85050, while the sum is 41.

The square root of 51527993 is about 7178.3001469707. The cubic root of 51527993 is about 372.1183406784.

The spelling of 51527993 in words is "fifty-one million, five hundred twenty-seven thousand, nine hundred ninety-three".