52217780 has 12 divisors (see below), whose sum is σ = 109657380. Its totient is φ = 20887104.

The previous prime is 52217771. The next prime is 52217821. The reversal of 52217780 is 8771225.

It can be written as a sum of positive squares in 2 ways, for example, as 18438436 + 33779344 = 4294^2 + 5812^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1305425 + ... + 1305464.

It is an arithmetic number, because the mean of its divisors is an integer number (9138115).

Almost surely, 2^52217780 is an apocalyptic number.

It is an amenable number.

52217780 is an abundant number, since it is smaller than the sum of its proper divisors (57439600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52217780 is a wasteful number, since it uses less digits than its factorization.

52217780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610898 (or 2610896 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 52217780 is about 7226.1870997089. The cubic root of 52217780 is about 373.7714580731.

It can be divided in two parts, 5 and 2217780, that multiplied together give a square (11088900 = 3330²).

The spelling of 52217780 in words is "fifty-two million, two hundred seventeen thousand, seven hundred eighty".