51528617 has 4 divisors (see below), whose sum is σ = 58889856. Its totient is φ = 44167380.

The previous prime is 51528613. The next prime is 51528623. The reversal of 51528617 is 71682515.

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 not a de Polignac number, because 51528617 - 2² = 51528613 is a prime.

It is a super-3 number, since 3×51528617³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51528611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3680609 + ... + 3680622.

It is an arithmetic number, because the mean of its divisors is an integer number (14722464).

Almost surely, 2^51528617 is an apocalyptic number.

It is an amenable number.

51528617 is a deficient number, since it is larger than the sum of its proper divisors (7361239).

51528617 is an equidigital number, since it uses as much as digits as its factorization.

51528617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7361238.

The product of its digits is 16800, while the sum is 35.

The square root of 51528617 is about 7178.3436111682. The cubic root of 51528617 is about 372.1198427804.

The spelling of 51528617 in words is "fifty-one million, five hundred twenty-eight thousand, six hundred seventeen".