51023219 has 4 divisors (see below), whose sum is σ = 54948096. Its totient is φ = 47098344.

The previous prime is 51023207. The next prime is 51023221. The reversal of 51023219 is 91232015.

51023219 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 a de Polignac number, because none of the positive numbers 2^k-51023219 is a prime.

It is a super-2 number, since 2×51023219² = 5206737754243922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51023194 and 51023203.

It is not an unprimeable number, because it can be changed into a prime (51023279) 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, 1962419 + ... + 1962444.

It is an arithmetic number, because the mean of its divisors is an integer number (13737024).

Almost surely, 2^51023219 is an apocalyptic number.

51023219 is a deficient number, since it is larger than the sum of its proper divisors (3924877).

51023219 is a wasteful number, since it uses less digits than its factorization.

51023219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3924876.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 51023219 is about 7143.0538987187. The cubic root of 51023219 is about 370.8992468396.

The spelling of 51023219 in words is "fifty-one million, twenty-three thousand, two hundred nineteen".