53145552 has 20 divisors (see below), whose sum is σ = 137292800. Its totient is φ = 17715168.

The previous prime is 53145517. The next prime is 53145577. The reversal of 53145552 is 25554135.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553552 + ... + 553647.

It is an arithmetic number, because the mean of its divisors is an integer number (6864640).

Almost surely, 2^53145552 is an apocalyptic number.

It is an amenable number.

53145552 is an abundant number, since it is smaller than the sum of its proper divisors (84147248).

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

53145552 is a wasteful number, since it uses less digits than its factorization.

53145552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107210 (or 1107204 counting only the distinct ones).

The product of its digits is 15000, while the sum is 30.

The square root of 53145552 is about 7290.0995877971. The cubic root of 53145552 is about 375.9721195564.

Adding to 53145552 its reverse (25554135), we get a palindrome (78699687).

The spelling of 53145552 in words is "fifty-three million, one hundred forty-five thousand, five hundred fifty-two".