53021307 has 4 divisors (see below), whose sum is σ = 70695080. Its totient is φ = 35347536.

The previous prime is 53021303. The next prime is 53021327. The reversal of 53021307 is 70312035.

It is a happy number.

53021307 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 not a de Polignac number, because 53021307 - 2² = 53021303 is a prime.

It is a super-2 number, since 2×53021307² = 5622517991976498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53021303) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 8836882 + ... + 8836887.

It is an arithmetic number, because the mean of its divisors is an integer number (17673770).

Almost surely, 2^53021307 is an apocalyptic number.

53021307 is a deficient number, since it is larger than the sum of its proper divisors (17673773).

53021307 is a wasteful number, since it uses less digits than its factorization.

53021307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17673772.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 53021307 is about 7281.5731130024. The cubic root of 53021307 is about 375.6789052697.

The spelling of 53021307 in words is "fifty-three million, twenty-one thousand, three hundred seven".