51023617 has 4 divisors (see below), whose sum is σ = 51076096. Its totient is φ = 50971140.

The previous prime is 51023597. The next prime is 51023657. The reversal of 51023617 is 71632015.

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 51023617 - 2¹¹ = 51021569 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51023591 and 51023600.

It is not an unprimeable number, because it can be changed into a prime (51023657) 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, 24753 + ... + 26734.

It is an arithmetic number, because the mean of its divisors is an integer number (12769024).

Almost surely, 2^51023617 is an apocalyptic number.

It is an amenable number.

51023617 is a deficient number, since it is larger than the sum of its proper divisors (52479).

51023617 is an equidigital number, since it uses as much as digits as its factorization.

51023617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52478.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 51023617 is about 7143.0817578969. The cubic root of 51023617 is about 370.9002112209.

The spelling of 51023617 in words is "fifty-one million, twenty-three thousand, six hundred seventeen".