53021544 has 16 divisors (see below), whose sum is σ = 132553920. Its totient is φ = 17673840.

The previous prime is 53021543. The next prime is 53021587. The reversal of 53021544 is 44512035.

It is a super-2 number, since 2×53021544² = 5622568256287872, which contains 22 as substring.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 2209231 = 53021544 / (5 + 3 + 0 + 2 + 1 + 5 + 4 + 4).

It is not an unprimeable number, because it can be changed into a prime (53021543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1104592 + ... + 1104639.

It is an arithmetic number, because the mean of its divisors is an integer number (8284620).

Almost surely, 2^53021544 is an apocalyptic number.

It is an amenable number.

53021544 is an abundant number, since it is smaller than the sum of its proper divisors (79532376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53021544 is a wasteful number, since it uses less digits than its factorization.

53021544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209240 (or 2209236 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 53021544 is about 7281.5893869402. The cubic root of 53021544 is about 375.6794650181.

Adding to 53021544 its reverse (44512035), we get a palindrome (97533579).

The spelling of 53021544 in words is "fifty-three million, twenty-one thousand, five hundred forty-four".