51583517 has 2 divisors, whose sum is σ = 51583518. Its totient is φ = 51583516.

The previous prime is 51583481. The next prime is 51583573. The reversal of 51583517 is 71538515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44368921 + 7214596 = 6661^2 + 2686^2 .

It is a cyclic number.

It is not a de Polignac number, because 51583517 - 2²⁰ = 50534941 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 (51583577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25791758 + 25791759.

It is an arithmetic number, because the mean of its divisors is an integer number (25791759).

Almost surely, 2^51583517 is an apocalyptic number.

It is an amenable number.

51583517 is a deficient number, since it is larger than the sum of its proper divisors (1).

51583517 is an equidigital number, since it uses as much as digits as its factorization.

51583517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21000, while the sum is 35.

The square root of 51583517 is about 7182.1665951160. The cubic root of 51583517 is about 372.2519514319.

The spelling of 51583517 in words is "fifty-one million, five hundred eighty-three thousand, five hundred seventeen".