53309812 has 12 divisors (see below), whose sum is σ = 93384900. Its totient is φ = 26628416.

The previous prime is 53309803. The next prime is 53309833. The reversal of 53309812 is 21890335.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 37896336 + 15413476 = 6156^2 + 3926^2 .

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, 1687 + ... + 10462.

It is an arithmetic number, because the mean of its divisors is an integer number (7782075).

Almost surely, 2^53309812 is an apocalyptic number.

It is an amenable number.

53309812 is a deficient number, since it is larger than the sum of its proper divisors (40075088).

53309812 is a wasteful number, since it uses less digits than its factorization.

53309812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13250 (or 13248 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 53309812 is about 7301.3568602007. The cubic root of 53309812 is about 376.3590673603.

The spelling of 53309812 in words is "fifty-three million, three hundred nine thousand, eight hundred twelve".