405520054 has 4 divisors (see below), whose sum is σ = 608280084. Its totient is φ = 202760026.

The previous prime is 405520051. The next prime is 405520069. The reversal of 405520054 is 450025504.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405520051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101380012 + ... + 101380015.

It is an arithmetic number, because the mean of its divisors is an integer number (152070021).

Almost surely, 2^405520054 is an apocalyptic number.

405520054 is a deficient number, since it is larger than the sum of its proper divisors (202760030).

405520054 is a wasteful number, since it uses less digits than its factorization.

405520054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202760029.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 405520054 is about 20137.5284978073. The cubic root of 405520054 is about 740.1801691812.

Adding to 405520054 its reverse (450025504), we get a palindrome (855545558).

The spelling of 405520054 in words is "four hundred five million, five hundred twenty thousand, fifty-four".