53420816 has 20 divisors (see below), whose sum is σ = 104922972. Its totient is φ = 26343936.

The previous prime is 53420803. The next prime is 53420833. The reversal of 53420816 is 61802435.

It can be written as a sum of positive squares in 2 ways, for example, as 20976400 + 32444416 = 4580^2 + 5696^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21701 + ... + 24036.

Almost surely, 2^53420816 is an apocalyptic number.

It is an amenable number.

53420816 is a deficient number, since it is larger than the sum of its proper divisors (51502156).

53420816 is a wasteful number, since it uses less digits than its factorization.

53420816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45818 (or 45812 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 53420816 is about 7308.9545079991. The cubic root of 53420816 is about 376.6201099774.

The spelling of 53420816 in words is "fifty-three million, four hundred twenty thousand, eight hundred sixteen".