53220766 has 4 divisors (see below), whose sum is σ = 79831152. Its totient is φ = 26610382.

The previous prime is 53220757. The next prime is 53220803. The reversal of 53220766 is 66702235.

53220766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13305190 + ... + 13305193.

It is an arithmetic number, because the mean of its divisors is an integer number (19957788).

Almost surely, 2^53220766 is an apocalyptic number.

53220766 is a deficient number, since it is larger than the sum of its proper divisors (26610386).

53220766 is a wasteful number, since it uses less digits than its factorization.

53220766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26610385.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 53220766 is about 7295.2564039929. The cubic root of 53220766 is about 376.1494002264.

The spelling of 53220766 in words is "fifty-three million, two hundred twenty thousand, seven hundred sixty-six".