53021305 has 16 divisors (see below), whose sum is σ = 67737600. Its totient is φ = 39726720.

The previous prime is 53021303. The next prime is 53021327. The reversal of 53021305 is 50312035.

It is not a de Polignac number, because 53021305 - 2¹ = 53021303 is a prime.

It is a super-2 number, since 2×53021305² = 5622517567806050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

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, 5320 + ... + 11590.

It is an arithmetic number, because the mean of its divisors is an integer number (4233600).

Almost surely, 2^53021305 is an apocalyptic number.

It is an amenable number.

53021305 is a deficient number, since it is larger than the sum of its proper divisors (14716295).

53021305 is a wasteful number, since it uses less digits than its factorization.

53021305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6384.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 53021305 is about 7281.5729756695. The cubic root of 53021305 is about 375.6789005461.

The spelling of 53021305 in words is "fifty-three million, twenty-one thousand, three hundred five".