43000051 has 2 divisors, whose sum is σ = 43000052. Its totient is φ = 43000050.

The previous prime is 43000049. The next prime is 43000057. The reversal of 43000051 is 15000034.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43000051 - 2¹ = 43000049 is a prime.

Together with 43000049, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 42999995 and 43000040.

It is not a weakly prime, because it can be changed into another prime (43000057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21500025 + 21500026.

It is an arithmetic number, because the mean of its divisors is an integer number (21500026).

Almost surely, 2^43000051 is an apocalyptic number.

43000051 is a deficient number, since it is larger than the sum of its proper divisors (1).

43000051 is an equidigital number, since it uses as much as digits as its factorization.

43000051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 43000051 is about 6557.4424130144. The cubic root of 43000051 is about 350.3399445451.

Adding to 43000051 its reverse (15000034), we get a palindrome (58000085).

The spelling of 43000051 in words is "forty-three million, fifty-one", and thus it is an aban number and an uban number.