51580369 has 2 divisors, whose sum is σ = 51580370. Its totient is φ = 51580368.

The previous prime is 51580367. The next prime is 51580381. The reversal of 51580369 is 96308515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44715969 + 6864400 = 6687^2 + 2620^2 .

It is a cyclic number.

It is not a de Polignac number, because 51580369 - 2¹ = 51580367 is a prime.

It is a super-2 number, since 2×51580369² = 5321068932352322, which contains 22 as substring.

Together with 51580367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51580367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25790184 + 25790185.

It is an arithmetic number, because the mean of its divisors is an integer number (25790185).

Almost surely, 2^51580369 is an apocalyptic number.

It is an amenable number.

51580369 is a deficient number, since it is larger than the sum of its proper divisors (1).

51580369 is an equidigital number, since it uses as much as digits as its factorization.

51580369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 51580369 is about 7181.9474378472. The cubic root of 51580369 is about 372.2443787740.

The spelling of 51580369 in words is "fifty-one million, five hundred eighty thousand, three hundred sixty-nine".