53521432 has 8 divisors (see below), whose sum is σ = 100352700. Its totient is φ = 26760712.

The previous prime is 53521393. The next prime is 53521439. The reversal of 53521432 is 23412535.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 53521397 and 53521406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53521439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345082 + ... + 3345097.

Almost surely, 2^53521432 is an apocalyptic number.

It is an amenable number.

53521432 is a deficient number, since it is larger than the sum of its proper divisors (46831268).

53521432 is a wasteful number, since it uses less digits than its factorization.

53521432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6690185 (or 6690181 counting only the distinct ones).

The product of its digits is 3600, while the sum is 25.

The square root of 53521432 is about 7315.8343338269. The cubic root of 53521432 is about 376.8564113924.

Adding to 53521432 its reverse (23412535), we get a palindrome (76933967).

The spelling of 53521432 in words is "fifty-three million, five hundred twenty-one thousand, four hundred thirty-two".