51434993 has 4 divisors (see below), whose sum is σ = 51454320. Its totient is φ = 51415668.

The previous prime is 51434989. The next prime is 51435011. The reversal of 51434993 is 39943415.

51434993 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51434993 - 2² = 51434989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51434093) 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, 4883 + ... + 11256.

It is an arithmetic number, because the mean of its divisors is an integer number (12863580).

Almost surely, 2^51434993 is an apocalyptic number.

It is an amenable number.

51434993 is a deficient number, since it is larger than the sum of its proper divisors (19327).

51434993 is a wasteful number, since it uses less digits than its factorization.

51434993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19326.

The product of its digits is 58320, while the sum is 38.

The square root of 51434993 is about 7171.8193647080. The cubic root of 51434993 is about 371.8943339806.

The spelling of 51434993 in words is "fifty-one million, four hundred thirty-four thousand, nine hundred ninety-three".