51701249 has 2 divisors, whose sum is σ = 51701250. Its totient is φ = 51701248.

The previous prime is 51701239. The next prime is 51701303. The reversal of 51701249 is 94210715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30724849 + 20976400 = 5543^2 + 4580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51701249 is a prime.

It is not a weakly prime, because it can be changed into another prime (51701239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25850624 + 25850625.

It is an arithmetic number, because the mean of its divisors is an integer number (25850625).

Almost surely, 2^51701249 is an apocalyptic number.

It is an amenable number.

51701249 is a deficient number, since it is larger than the sum of its proper divisors (1).

51701249 is an equidigital number, since it uses as much as digits as its factorization.

51701249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 51701249 is about 7190.3580578439. The cubic root of 51701249 is about 372.5349401936.

The spelling of 51701249 in words is "fifty-one million, seven hundred one thousand, two hundred forty-nine".