53121020 has 12 divisors (see below), whose sum is σ = 111554184. Its totient is φ = 21248400.

The previous prime is 53121001. The next prime is 53121031. The reversal of 53121020 is 2012135.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 53120986 and 53121004.

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, 1328006 + ... + 1328045.

It is an arithmetic number, because the mean of its divisors is an integer number (9296182).

Almost surely, 2^53121020 is an apocalyptic number.

It is an amenable number.

53121020 is an abundant number, since it is smaller than the sum of its proper divisors (58433164).

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

53121020 is a wasteful number, since it uses less digits than its factorization.

53121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656060 (or 2656058 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 53121020 is about 7288.4168376953. The cubic root of 53121020 is about 375.9142610450.

Adding to 53121020 its reverse (2012135), we get a palindrome (55133155).

The spelling of 53121020 in words is "fifty-three million, one hundred twenty-one thousand, twenty".