52787321 has 2 divisors, whose sum is σ = 52787322. Its totient is φ = 52787320.

The previous prime is 52787309. The next prime is 52787341. The reversal of 52787321 is 12378725.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48930025 + 3857296 = 6995^2 + 1964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52787321 is a prime.

It is not a weakly prime, because it can be changed into another prime (52787341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26393660 + 26393661.

It is an arithmetic number, because the mean of its divisors is an integer number (26393661).

Almost surely, 2^52787321 is an apocalyptic number.

It is an amenable number.

52787321 is a deficient number, since it is larger than the sum of its proper divisors (1).

52787321 is an equidigital number, since it uses as much as digits as its factorization.

52787321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 35.

The square root of 52787321 is about 7265.4883524784. The cubic root of 52787321 is about 375.1254596513.

The spelling of 52787321 in words is "fifty-two million, seven hundred eighty-seven thousand, three hundred twenty-one".