51046431 has 4 divisors (see below), whose sum is σ = 68061912. Its totient is φ = 34030952.

The previous prime is 51046423. The next prime is 51046433. The reversal of 51046431 is 13464015.

51046431 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 51046431 - 2³ = 51046423 is a prime.

It is a super-2 number, since 2×51046431² = 5211476235675522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51046433) 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, 8507736 + ... + 8507741.

It is an arithmetic number, because the mean of its divisors is an integer number (17015478).

Almost surely, 2^51046431 is an apocalyptic number.

51046431 is a deficient number, since it is larger than the sum of its proper divisors (17015481).

51046431 is a wasteful number, since it uses less digits than its factorization.

51046431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17015480.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 51046431 is about 7144.6785092123. The cubic root of 51046431 is about 370.9554827277.

The spelling of 51046431 in words is "fifty-one million, forty-six thousand, four hundred thirty-one".