52780505 has 8 divisors (see below), whose sum is σ = 63687624. Its totient is φ = 41990400.

The previous prime is 52780487. The next prime is 52780543. The reversal of 52780505 is 50508725.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6390784 + 46389721 = 2528^2 + 6811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52780505 - 2⁸ = 52780249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28256 + ... + 30065.

It is an arithmetic number, because the mean of its divisors is an integer number (7960953).

Almost surely, 2^52780505 is an apocalyptic number.

It is an amenable number.

52780505 is a deficient number, since it is larger than the sum of its proper divisors (10907119).

52780505 is a wasteful number, since it uses less digits than its factorization.

52780505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58507.

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 52780505 is about 7265.0192704493. The cubic root of 52780505 is about 375.1093133170.

The spelling of 52780505 in words is "fifty-two million, seven hundred eighty thousand, five hundred five".