51617437 has 2 divisors, whose sum is σ = 51617438. Its totient is φ = 51617436.

The previous prime is 51617431. The next prime is 51617441. The reversal of 51617437 is 73471615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27154521 + 24462916 = 5211^2 + 4946^2 .

It is a cyclic number.

It is not a de Polignac number, because 51617437 - 2⁷ = 51617309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51617431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25808718 + 25808719.

It is an arithmetic number, because the mean of its divisors is an integer number (25808719).

Almost surely, 2^51617437 is an apocalyptic number.

It is an amenable number.

51617437 is a deficient number, since it is larger than the sum of its proper divisors (1).

51617437 is an equidigital number, since it uses as much as digits as its factorization.

51617437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 34.

The square root of 51617437 is about 7184.5276114718. The cubic root of 51617437 is about 372.3335280043. Note that the first 3 decimals are identical.

The spelling of 51617437 in words is "fifty-one million, six hundred seventeen thousand, four hundred thirty-seven".