53021793 has 16 divisors (see below), whose sum is σ = 81660096. Its totient is φ = 30243840.

The previous prime is 53021789. The next prime is 53021797. The reversal of 53021793 is 39712035.

It is an interprime number because it is at equal distance from previous prime (53021789) and next prime (53021797).

It is not a de Polignac number, because 53021793 - 2² = 53021789 is a prime.

It is a super-2 number, since 2×53021793² = 5622621065869698, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53021793.

It is not an unprimeable number, because it can be changed into a prime (53021797) 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, 46696 + ... + 47817.

It is an arithmetic number, because the mean of its divisors is an integer number (5103756).

Almost surely, 2^53021793 is an apocalyptic number.

It is an amenable number.

53021793 is a deficient number, since it is larger than the sum of its proper divisors (28638303).

53021793 is a wasteful number, since it uses less digits than its factorization.

53021793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94544.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 53021793 is about 7281.6064848356. The cubic root of 53021793 is about 375.6800531063.

The spelling of 53021793 in words is "fifty-three million, twenty-one thousand, seven hundred ninety-three".