53121806 has 4 divisors (see below), whose sum is σ = 79682712. Its totient is φ = 26560902.

The previous prime is 53121799. The next prime is 53121829. The reversal of 53121806 is 60812135.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13280450 + ... + 13280453.

It is an arithmetic number, because the mean of its divisors is an integer number (19920678).

Almost surely, 2^53121806 is an apocalyptic number.

53121806 is a deficient number, since it is larger than the sum of its proper divisors (26560906).

53121806 is a wasteful number, since it uses less digits than its factorization.

53121806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26560905.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 53121806 is about 7288.4707586708. The cubic root of 53121806 is about 375.9161150955.

The spelling of 53121806 in words is "fifty-three million, one hundred twenty-one thousand, eight hundred six".