51663371 has 2 divisors, whose sum is σ = 51663372. Its totient is φ = 51663370.

The previous prime is 51663347. The next prime is 51663383. The reversal of 51663371 is 17336615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51663371 - 2⁶ = 51663307 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51623371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25831685 + 25831686.

It is an arithmetic number, because the mean of its divisors is an integer number (25831686).

Almost surely, 2^51663371 is an apocalyptic number.

51663371 is a deficient number, since it is larger than the sum of its proper divisors (1).

51663371 is an equidigital number, since it uses as much as digits as its factorization.

51663371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 32.

The square root of 51663371 is about 7187.7236313036. The cubic root of 51663371 is about 372.4439409355.

Adding to 51663371 its reverse (17336615), we get a palindrome (68999986).

The spelling of 51663371 in words is "fifty-one million, six hundred sixty-three thousand, three hundred seventy-one".