53243645 has 48 divisors (see below), whose sum is σ = 81491760. Its totient is φ = 33094656.

The previous prime is 53243639. The next prime is 53243651. The reversal of 53243645 is 54634235.

It is an interprime number because it is at equal distance from previous prime (53243639) and next prime (53243651).

It can be written as a sum of positive squares in 8 ways, for example, as 41209 + 53202436 = 203^2 + 7294^2 .

It is not a de Polignac number, because 53243645 - 2⁶ = 53243581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 232391 + ... + 232619.

It is an arithmetic number, because the mean of its divisors is an integer number (1697745).

Almost surely, 2^53243645 is an apocalyptic number.

It is an amenable number.

53243645 is a deficient number, since it is larger than the sum of its proper divisors (28248115).

53243645 is a wasteful number, since it uses less digits than its factorization.

53243645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 327 counting only the distinct ones).

The product of its digits is 43200, while the sum is 32.

The square root of 53243645 is about 7296.8243092458. The cubic root of 53243645 is about 376.2032932828.

The spelling of 53243645 in words is "fifty-three million, two hundred forty-three thousand, six hundred forty-five".