51233617 has 2 divisors, whose sum is σ = 51233618. Its totient is φ = 51233616.

The previous prime is 51233591. The next prime is 51233621. The reversal of 51233617 is 71633215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51208336 + 25281 = 7156^2 + 159^2 .

It is a cyclic number.

It is not a de Polignac number, because 51233617 - 2²³ = 42845009 is a prime.

It is not a weakly prime, because it can be changed into another prime (51233657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25616808 + 25616809.

It is an arithmetic number, because the mean of its divisors is an integer number (25616809).

Almost surely, 2^51233617 is an apocalyptic number.

It is an amenable number.

51233617 is a deficient number, since it is larger than the sum of its proper divisors (1).

51233617 is an equidigital number, since it uses as much as digits as its factorization.

51233617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 28.

The square root of 51233617 is about 7157.7662018258. The cubic root of 51233617 is about 371.4083578109.

The spelling of 51233617 in words is "fifty-one million, two hundred thirty-three thousand, six hundred seventeen".