53216780 has 12 divisors (see below), whose sum is σ = 111755280. Its totient is φ = 21286704.

The previous prime is 53216759. The next prime is 53216789. The reversal of 53216780 is 8761235.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (53216789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1330400 + ... + 1330439.

It is an arithmetic number, because the mean of its divisors is an integer number (9312940).

Almost surely, 2^53216780 is an apocalyptic number.

It is an amenable number.

53216780 is an abundant number, since it is smaller than the sum of its proper divisors (58538500).

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

53216780 is a wasteful number, since it uses less digits than its factorization.

53216780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660848 (or 2660846 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 53216780 is about 7294.9832076572. The cubic root of 53216780 is about 376.1400093498.

The spelling of 53216780 in words is "fifty-three million, two hundred sixteen thousand, seven hundred eighty".