51031073 has 2 divisors, whose sum is σ = 51031074. Its totient is φ = 51031072.

The previous prime is 51031031. The next prime is 51031081. The reversal of 51031073 is 37013015.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50865424 + 165649 = 7132^2 + 407^2 .

It is a cyclic number.

It is not a de Polignac number, because 51031073 - 2¹⁸ = 50768929 is a prime.

It is not a weakly prime, because it can be changed into another prime (51031373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25515536 + 25515537.

It is an arithmetic number, because the mean of its divisors is an integer number (25515537).

Almost surely, 2^51031073 is an apocalyptic number.

It is an amenable number.

51031073 is a deficient number, since it is larger than the sum of its proper divisors (1).

51031073 is an equidigital number, since it uses as much as digits as its factorization.

51031073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 315, while the sum is 20.

The square root of 51031073 is about 7143.6036424203. The cubic root of 51031073 is about 370.9182766936.

Adding to 51031073 its reverse (37013015), we get a palindrome (88044088).

The spelling of 51031073 in words is "fifty-one million, thirty-one thousand, seventy-three".