54140813 has 2 divisors, whose sum is σ = 54140814. Its totient is φ = 54140812.

The previous prime is 54140809. The next prime is 54140843. The reversal of 54140813 is 31804145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46812964 + 7327849 = 6842^2 + 2707^2 .

It is a cyclic number.

It is not a de Polignac number, because 54140813 - 2² = 54140809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54140843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27070406 + 27070407.

It is an arithmetic number, because the mean of its divisors is an integer number (27070407).

Almost surely, 2^54140813 is an apocalyptic number.

It is an amenable number.

54140813 is a deficient number, since it is larger than the sum of its proper divisors (1).

54140813 is an equidigital number, since it uses as much as digits as its factorization.

54140813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 54140813 is about 7358.0441015259. The cubic root of 54140813 is about 378.3045728858.

Adding to 54140813 its reverse (31804145), we get a palindrome (85944958).

The spelling of 54140813 in words is "fifty-four million, one hundred forty thousand, eight hundred thirteen".