51011023 has 4 divisors (see below), whose sum is σ = 58298320. Its totient is φ = 43723728.

The previous prime is 51010997. The next prime is 51011041. The reversal of 51011023 is 32011015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32011015 = 5 ⋅6402203.

It is a cyclic number.

It is not a de Polignac number, because 51011023 - 2⁹ = 51010511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51010994 and 51011012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51011423) 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, 3643638 + ... + 3643651.

It is an arithmetic number, because the mean of its divisors is an integer number (14574580).

Almost surely, 2^51011023 is an apocalyptic number.

51011023 is a deficient number, since it is larger than the sum of its proper divisors (7287297).

51011023 is an equidigital number, since it uses as much as digits as its factorization.

51011023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7287296.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 51011023 is about 7142.2001512139. The cubic root of 51011023 is about 370.8696926630.

Adding to 51011023 its reverse (32011015), we get a palindrome (83022038).

The spelling of 51011023 in words is "fifty-one million, eleven thousand, twenty-three".