51713021 has 2 divisors, whose sum is σ = 51713022. Its totient is φ = 51713020.

The previous prime is 51712957. The next prime is 51713083. The reversal of 51713021 is 12031715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44368921 + 7344100 = 6661^2 + 2710^2 .

It is a cyclic number.

It is not a de Polignac number, because 51713021 - 2⁶ = 51712957 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51712984 and 51713002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51713521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25856510 + 25856511.

It is an arithmetic number, because the mean of its divisors is an integer number (25856511).

Almost surely, 2^51713021 is an apocalyptic number.

It is an amenable number.

51713021 is a deficient number, since it is larger than the sum of its proper divisors (1).

51713021 is an equidigital number, since it uses as much as digits as its factorization.

51713021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 51713021 is about 7191.1766074823. The cubic root of 51713021 is about 372.5632125506.

Adding to 51713021 its reverse (12031715), we get a palindrome (63744736).

It can be divided in two parts, 5171 and 3021, that added together give a 13-th power (8192 = 2¹³).

The spelling of 51713021 in words is "fifty-one million, seven hundred thirteen thousand, twenty-one".