53121212 has 6 divisors (see below), whose sum is σ = 92962128. Its totient is φ = 26560604.

The previous prime is 53121203. The next prime is 53121217. The reversal of 53121212 is 21212135.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53121217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6640148 + ... + 6640155.

It is an arithmetic number, because the mean of its divisors is an integer number (15493688).

Almost surely, 2^53121212 is an apocalyptic number.

It is an amenable number.

53121212 is a deficient number, since it is larger than the sum of its proper divisors (39840916).

53121212 is a wasteful number, since it uses less digits than its factorization.

53121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13280307 (or 13280305 counting only the distinct ones).

The product of its digits is 120, while the sum is 17.

The square root of 53121212 is about 7288.4300092681. The cubic root of 53121212 is about 375.9147139445.

Adding to 53121212 its reverse (21212135), we get a palindrome (74333347).

The spelling of 53121212 in words is "fifty-three million, one hundred twenty-one thousand, two hundred twelve".