54400513 has 4 divisors (see below), whose sum is σ = 54537940. Its totient is φ = 54263088.

The previous prime is 54400499. The next prime is 54400517. The reversal of 54400513 is 31500445.

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 13593969 + 40806544 = 3687^2 + 6388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54400513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54400517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68118 + ... + 68911.

It is an arithmetic number, because the mean of its divisors is an integer number (13634485).

Almost surely, 2^54400513 is an apocalyptic number.

It is an amenable number.

54400513 is a deficient number, since it is larger than the sum of its proper divisors (137427).

54400513 is a wasteful number, since it uses less digits than its factorization.

54400513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137426.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 54400513 is about 7375.6703424163. The cubic root of 54400513 is about 378.9084859211.

Adding to 54400513 its reverse (31500445), we get a palindrome (85900958).

The spelling of 54400513 in words is "fifty-four million, four hundred thousand, five hundred thirteen".