51023031 has 4 divisors (see below), whose sum is σ = 68030712. Its totient is φ = 34015352.

The previous prime is 51022997. The next prime is 51023053. The reversal of 51023031 is 13032015.

It is a happy number.

51023031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51023031 - 2⁷ = 51022903 is a prime.

It is a super-2 number, since 2×51023031² = 5206699384853922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51023031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51023081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8503836 + ... + 8503841.

It is an arithmetic number, because the mean of its divisors is an integer number (17007678).

Almost surely, 2^51023031 is an apocalyptic number.

51023031 is a deficient number, since it is larger than the sum of its proper divisors (17007681).

51023031 is a wasteful number, since it uses less digits than its factorization.

51023031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17007680.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 51023031 is about 7143.0407390690. The cubic root of 51023031 is about 370.8987913009.

Adding to 51023031 its reverse (13032015), we get a palindrome (64055046).

The spelling of 51023031 in words is "fifty-one million, twenty-three thousand, thirty-one".