53713821 has 16 divisors (see below), whose sum is σ = 81995904. Its totient is φ = 30638784.

The previous prime is 53713819. The next prime is 53713831. The reversal of 53713821 is 12831735.

It is not a de Polignac number, because 53713821 - 2¹ = 53713819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53713801) 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, 11755 + ... + 15671.

It is an arithmetic number, because the mean of its divisors is an integer number (5124744).

Almost surely, 2^53713821 is an apocalyptic number.

It is an amenable number.

53713821 is a deficient number, since it is larger than the sum of its proper divisors (28282083).

53713821 is a wasteful number, since it uses less digits than its factorization.

53713821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4580.

The product of its digits is 5040, while the sum is 30.

The square root of 53713821 is about 7328.9713466489. The cubic root of 53713821 is about 377.3074227909.

The spelling of 53713821 in words is "fifty-three million, seven hundred thirteen thousand, eight hundred twenty-one".