51719131 has 2 divisors, whose sum is σ = 51719132. Its totient is φ = 51719130.

The previous prime is 51719123. The next prime is 51719137. The reversal of 51719131 is 13191715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51719131 - 2³ = 51719123 is a prime.

It is a super-2 number, since 2×51719131² = 5349737022790322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51719131.

It is not a weakly prime, because it can be changed into another prime (51719137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25859565 + 25859566.

It is an arithmetic number, because the mean of its divisors is an integer number (25859566).

Almost surely, 2^51719131 is an apocalyptic number.

51719131 is a deficient number, since it is larger than the sum of its proper divisors (1).

51719131 is an equidigital number, since it uses as much as digits as its factorization.

51719131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 945, while the sum is 28.

The square root of 51719131 is about 7191.6014211023. The cubic root of 51719131 is about 372.5778850098.

The spelling of 51719131 in words is "fifty-one million, seven hundred nineteen thousand, one hundred thirty-one".