51227993 has 2 divisors, whose sum is σ = 51227994. Its totient is φ = 51227992.

The previous prime is 51227951. The next prime is 51228013. The reversal of 51227993 is 39972215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30824704 + 20403289 = 5552^2 + 4517^2 .

It is a cyclic number.

It is not a de Polignac number, because 51227993 - 2¹² = 51223897 is a prime.

It is not a weakly prime, because it can be changed into another prime (51227893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25613996 + 25613997.

It is an arithmetic number, because the mean of its divisors is an integer number (25613997).

Almost surely, 2^51227993 is an apocalyptic number.

It is an amenable number.

51227993 is a deficient number, since it is larger than the sum of its proper divisors (1).

51227993 is an equidigital number, since it uses as much as digits as its factorization.

51227993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 38.

The square root of 51227993 is about 7157.3733310482. The cubic root of 51227993 is about 371.3947672743.

The spelling of 51227993 in words is "fifty-one million, two hundred twenty-seven thousand, nine hundred ninety-three".