51248617 has 4 divisors (see below), whose sum is σ = 58569856. Its totient is φ = 43927380.

The previous prime is 51248609. The next prime is 51248633. The reversal of 51248617 is 71684215.

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 not a de Polignac number, because 51248617 - 2³ = 51248609 is a prime.

It is a super-3 number, since 3×51248617³ (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 (51248657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3660609 + ... + 3660622.

It is an arithmetic number, because the mean of its divisors is an integer number (14642464).

Almost surely, 2^51248617 is an apocalyptic number.

It is an amenable number.

51248617 is a deficient number, since it is larger than the sum of its proper divisors (7321239).

51248617 is an equidigital number, since it uses as much as digits as its factorization.

51248617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7321238.

The product of its digits is 13440, while the sum is 34.

The square root of 51248617 is about 7158.8139380766. The cubic root of 51248617 is about 371.4446008227. Note that the first 3 decimals are identical.

The spelling of 51248617 in words is "fifty-one million, two hundred forty-eight thousand, six hundred seventeen".