51669313 has 2 divisors, whose sum is σ = 51669314. Its totient is φ = 51669312.

The previous prime is 51669301. The next prime is 51669349. The reversal of 51669313 is 31396615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33547264 + 18122049 = 5792^2 + 4257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51669313 is a prime.

It is not a weakly prime, because it can be changed into another prime (51669383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25834656 + 25834657.

It is an arithmetic number, because the mean of its divisors is an integer number (25834657).

Almost surely, 2^51669313 is an apocalyptic number.

It is an amenable number.

51669313 is a deficient number, since it is larger than the sum of its proper divisors (1).

51669313 is an equidigital number, since it uses as much as digits as its factorization.

51669313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 34.

The square root of 51669313 is about 7188.1369630802. The cubic root of 51669313 is about 372.4582191176.

The spelling of 51669313 in words is "fifty-one million, six hundred sixty-nine thousand, three hundred thirteen".