51001597 has 2 divisors, whose sum is σ = 51001598. Its totient is φ = 51001596.

The previous prime is 51001579. The next prime is 51001619. The reversal of 51001597 is 79510015.

Together with previous prime (51001579) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47692836 + 3308761 = 6906^2 + 1819^2 .

It is a cyclic number.

It is not a de Polignac number, because 51001597 - 2⁷ = 51001469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51001297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25500798 + 25500799.

It is an arithmetic number, because the mean of its divisors is an integer number (25500799).

Almost surely, 2^51001597 is an apocalyptic number.

It is an amenable number.

51001597 is a deficient number, since it is larger than the sum of its proper divisors (1).

51001597 is an equidigital number, since it uses as much as digits as its factorization.

51001597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1575, while the sum is 28.

The square root of 51001597 is about 7141.5402400323. The cubic root of 51001597 is about 370.8468477113.

The spelling of 51001597 in words is "fifty-one million, one thousand, five hundred ninety-seven".