53503212 has 48 divisors (see below), whose sum is σ = 143101952. Its totient is φ = 15240960.

The previous prime is 53503207. The next prime is 53503213. The reversal of 53503212 is 21230535.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (53503213) 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, 35637 + ... + 37107.

Almost surely, 2^53503212 is an apocalyptic number.

It is an amenable number.

53503212 is an abundant number, since it is smaller than the sum of its proper divisors (89598740).

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

53503212 is a wasteful number, since it uses less digits than its factorization.

53503212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918 (or 1916 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 53503212 is about 7314.5889836682. The cubic root of 53503212 is about 376.8136428362.

Adding to 53503212 its reverse (21230535), we get a palindrome (74733747).

The spelling of 53503212 in words is "fifty-three million, five hundred three thousand, two hundred twelve".