51567979 has 2 divisors, whose sum is σ = 51567980. Its totient is φ = 51567978.

The previous prime is 51567959. The next prime is 51568007. The reversal of 51567979 is 97976515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51567979 - 2¹⁷ = 51436907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51567959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25783989 + 25783990.

It is an arithmetic number, because the mean of its divisors is an integer number (25783990).

Almost surely, 2^51567979 is an apocalyptic number.

51567979 is a deficient number, since it is larger than the sum of its proper divisors (1).

51567979 is an equidigital number, since it uses as much as digits as its factorization.

51567979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 595350, while the sum is 49.

The square root of 51567979 is about 7181.0848066291. The cubic root of 51567979 is about 372.2145710695.

The spelling of 51567979 in words is "fifty-one million, five hundred sixty-seven thousand, nine hundred seventy-nine".