51141997 has 2 divisors, whose sum is σ = 51141998. Its totient is φ = 51141996.

The previous prime is 51141983. The next prime is 51142019. The reversal of 51141997 is 79914115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47734281 + 3407716 = 6909^2 + 1846^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51141997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51141907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25570998 + 25570999.

It is an arithmetic number, because the mean of its divisors is an integer number (25570999).

Almost surely, 2^51141997 is an apocalyptic number.

It is an amenable number.

51141997 is a deficient number, since it is larger than the sum of its proper divisors (1).

51141997 is an equidigital number, since it uses as much as digits as its factorization.

51141997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 37.

The square root of 51141997 is about 7151.3632966030. The cubic root of 51141997 is about 371.1868317894.

The spelling of 51141997 in words is "fifty-one million, one hundred forty-one thousand, nine hundred ninety-seven".