52217784 has 48 divisors (see below), whose sum is σ = 146666520. Its totient is φ = 17405280.

The previous prime is 52217771. The next prime is 52217821. The reversal of 52217784 is 48771225.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11487 + ... + 15374.

Almost surely, 2^52217784 is an apocalyptic number.

52217784 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

52217784 is an abundant number, since it is smaller than the sum of its proper divisors (94448736).

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

52217784 is a wasteful number, since it uses less digits than its factorization.

52217784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26882 (or 26866 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 52217784 is about 7226.1873764801. The cubic root of 52217784 is about 373.7714676170.

The spelling of 52217784 in words is "fifty-two million, two hundred seventeen thousand, seven hundred eighty-four".