51207943 has 4 divisors (see below), whose sum is σ = 51260608. Its totient is φ = 51155280.

The previous prime is 51207931. The next prime is 51207971. The reversal of 51207943 is 34970215.

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-51207943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51207643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24846 + ... + 26827.

It is an arithmetic number, because the mean of its divisors is an integer number (12815152).

Almost surely, 2^51207943 is an apocalyptic number.

51207943 is a deficient number, since it is larger than the sum of its proper divisors (52665).

51207943 is an equidigital number, since it uses as much as digits as its factorization.

51207943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52664.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 51207943 is about 7155.9725404727. The cubic root of 51207943 is about 371.3463078524.

The spelling of 51207943 in words is "fifty-one million, two hundred seven thousand, nine hundred forty-three".