53021306 has 32 divisors (see below), whose sum is σ = 88315920. Its totient is φ = 23721984.

The previous prime is 53021303. The next prime is 53021327. The reversal of 53021306 is 60312035.

It can be written as a sum of positive squares in 8 ways, for example, as 25090081 + 27931225 = 5009^2 + 5285^2 .

It is a super-2 number, since 2×53021306² = 5622517779891272, which contains 22 as substring.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150026 + ... + 150378.

Almost surely, 2^53021306 is an apocalyptic number.

53021306 is a deficient number, since it is larger than the sum of its proper divisors (35294614).

53021306 is a wasteful number, since it uses less digits than its factorization.

53021306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 53021306 is about 7281.5730443360. The cubic root of 53021306 is about 375.6789029079.

The spelling of 53021306 in words is "fifty-three million, twenty-one thousand, three hundred six".