51701501 has 2 divisors, whose sum is σ = 51701502. Its totient is φ = 51701500.

The previous prime is 51701491. The next prime is 51701509. The reversal of 51701501 is 10510715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51466276 + 235225 = 7174^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 51701501 - 2¹⁰ = 51700477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51701509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25850750 + 25850751.

It is an arithmetic number, because the mean of its divisors is an integer number (25850751).

Almost surely, 2^51701501 is an apocalyptic number.

It is an amenable number.

51701501 is a deficient number, since it is larger than the sum of its proper divisors (1).

51701501 is an equidigital number, since it uses as much as digits as its factorization.

51701501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 175, while the sum is 20.

The square root of 51701501 is about 7190.3755812892. The cubic root of 51701501 is about 372.5355454572.

The spelling of 51701501 in words is "fifty-one million, seven hundred one thousand, five hundred one".