51906233 has 4 divisors (see below), whose sum is σ = 54638160. Its totient is φ = 49174308.

The previous prime is 51906229. The next prime is 51906251. The reversal of 51906233 is 33260915.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33260915 = 5 ⋅6652183.

It is a cyclic number.

It is not a de Polignac number, because 51906233 - 2² = 51906229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51906196 and 51906205.

It is not an unprimeable number, because it can be changed into a prime (51906263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1365935 + ... + 1365972.

It is an arithmetic number, because the mean of its divisors is an integer number (13659540).

Almost surely, 2^51906233 is an apocalyptic number.

It is an amenable number.

51906233 is a deficient number, since it is larger than the sum of its proper divisors (2731927).

51906233 is a wasteful number, since it uses less digits than its factorization.

51906233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731926.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 51906233 is about 7204.5980456928. The cubic root of 51906233 is about 373.0266304566.

The spelling of 51906233 in words is "fifty-one million, nine hundred six thousand, two hundred thirty-three".