51019429 has 2 divisors, whose sum is σ = 51019430. Its totient is φ = 51019428.

The previous prime is 51019399. The next prime is 51019433. The reversal of 51019429 is 92491015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48678529 + 2340900 = 6977^2 + 1530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51019429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51019429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51019469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25509714 + 25509715.

It is an arithmetic number, because the mean of its divisors is an integer number (25509715).

Almost surely, 2^51019429 is an apocalyptic number.

It is an amenable number.

51019429 is a deficient number, since it is larger than the sum of its proper divisors (1).

51019429 is an equidigital number, since it uses as much as digits as its factorization.

51019429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 51019429 is about 7142.7886010997. The cubic root of 51019429 is about 370.8900631582.

The spelling of 51019429 in words is "fifty-one million, nineteen thousand, four hundred twenty-nine".