406221456254 has 16 divisors (see below), whose sum is σ = 610202419200. Its totient is φ = 202820849400.

The previous prime is 406221456241. The next prime is 406221456269. The reversal of 406221456254 is 452654122604.

It is a super-2 number, since 2×406221456254² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4148147 + ... + 4244945.

It is an arithmetic number, because the mean of its divisors is an integer number (38137651200).

Almost surely, 2^406221456254 is an apocalyptic number.

406221456254 is a deficient number, since it is larger than the sum of its proper divisors (203980962946).

406221456254 is a wasteful number, since it uses less digits than its factorization.

406221456254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99775.

The product of its (nonzero) digits is 460800, while the sum is 41.

Adding to 406221456254 its reverse (452654122604), we get a palindrome (858875578858).

The spelling of 406221456254 in words is "four hundred six billion, two hundred twenty-one million, four hundred fifty-six thousand, two hundred fifty-four".