54713821 has 4 divisors (see below), whose sum is σ = 55255644. Its totient is φ = 54172000.

The previous prime is 54713819. The next prime is 54713831. The reversal of 54713821 is 12831745.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54096025 + 617796 = 7355^2 + 786^2 .

It is a cyclic number.

It is not a de Polignac number, because 54713821 - 2¹ = 54713819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54713801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270760 + ... + 270961.

It is an arithmetic number, because the mean of its divisors is an integer number (13813911).

Almost surely, 2^54713821 is an apocalyptic number.

It is an amenable number.

54713821 is a deficient number, since it is larger than the sum of its proper divisors (541823).

54713821 is a wasteful number, since it uses less digits than its factorization.

54713821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541822.

The product of its digits is 6720, while the sum is 31.

The square root of 54713821 is about 7396.8791392046. The cubic root of 54713821 is about 379.6345077618.

The spelling of 54713821 in words is "fifty-four million, seven hundred thirteen thousand, eight hundred twenty-one".