53021552 has 20 divisors (see below), whose sum is σ = 108136680. Its totient is φ = 25115328.

The previous prime is 53021543. The next prime is 53021587. The reversal of 53021552 is 25512035.

It is a super-2 number, since 2×53021552² = 5622569952977408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 86903 + ... + 87510.

It is an arithmetic number, because the mean of its divisors is an integer number (5406834).

Almost surely, 2^53021552 is an apocalyptic number.

It is an amenable number.

53021552 is an abundant number, since it is smaller than the sum of its proper divisors (55115128).

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

53021552 is a wasteful number, since it uses less digits than its factorization.

53021552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174440 (or 174434 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 53021552 is about 7281.5899362708. The cubic root of 53021552 is about 375.6794839125.

Adding to 53021552 its reverse (25512035), we get a palindrome (78533587).

The spelling of 53021552 in words is "fifty-three million, twenty-one thousand, five hundred fifty-two".