51530867 has 2 divisors, whose sum is σ = 51530868. Its totient is φ = 51530866.

The previous prime is 51530849. The next prime is 51530887. The reversal of 51530867 is 76803515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51530867 - 2⁶ = 51530803 is a prime.

It is not a weakly prime, because it can be changed into another prime (51530887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25765433 + 25765434.

It is an arithmetic number, because the mean of its divisors is an integer number (25765434).

Almost surely, 2^51530867 is an apocalyptic number.

51530867 is a deficient number, since it is larger than the sum of its proper divisors (1).

51530867 is an equidigital number, since it uses as much as digits as its factorization.

51530867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 51530867 is about 7178.5003308491. The cubic root of 51530867 is about 372.1252589129.

The spelling of 51530867 in words is "fifty-one million, five hundred thirty thousand, eight hundred sixty-seven".