51958121 has 2 divisors, whose sum is σ = 51958122. Its totient is φ = 51958120.

The previous prime is 51958099. The next prime is 51958129. The reversal of 51958121 is 12185915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51768025 + 190096 = 7195^2 + 436^2 .

It is a cyclic number.

It is not a de Polignac number, because 51958121 - 2⁶ = 51958057 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51958129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25979060 + 25979061.

It is an arithmetic number, because the mean of its divisors is an integer number (25979061).

Almost surely, 2^51958121 is an apocalyptic number.

It is an amenable number.

51958121 is a deficient number, since it is larger than the sum of its proper divisors (1).

51958121 is an equidigital number, since it uses as much as digits as its factorization.

51958121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 32.

The square root of 51958121 is about 7208.1981798505. The cubic root of 51958121 is about 373.1508875941.

The spelling of 51958121 in words is "fifty-one million, nine hundred fifty-eight thousand, one hundred twenty-one".