51720301 has 2 divisors, whose sum is σ = 51720302. Its totient is φ = 51720300.

The previous prime is 51720293. The next prime is 51720313. The reversal of 51720301 is 10302715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26770276 + 24950025 = 5174^2 + 4995^2 .

It is a cyclic number.

It is not a de Polignac number, because 51720301 - 2³ = 51720293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51720101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25860150 + 25860151.

It is an arithmetic number, because the mean of its divisors is an integer number (25860151).

Almost surely, 2^51720301 is an apocalyptic number.

It is an amenable number.

51720301 is a deficient number, since it is larger than the sum of its proper divisors (1).

51720301 is an equidigital number, since it uses as much as digits as its factorization.

51720301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 51720301 is about 7191.6827655285. The cubic root of 51720301 is about 372.5806944979.

The spelling of 51720301 in words is "fifty-one million, seven hundred twenty thousand, three hundred one".