405256223100 has 72 divisors (see below), whose sum is σ = 1234254058240. Its totient is φ = 102380518080.

The previous prime is 405256223087. The next prime is 405256223107. The reversal of 405256223100 is 1322652504.

It is a super-2 number, since 2×405256223100² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405256223107) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 35543092 + ... + 35554491.

Almost surely, 2^405256223100 is an apocalyptic number.

It is an amenable number.

405256223100 is an abundant number, since it is smaller than the sum of its proper divisors (828997835140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405256223100 is a wasteful number, since it uses less digits than its factorization.

405256223100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71097619 (or 71097612 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 405256223100 its reverse (1322652504), we get a palindrome (406578875604).

The spelling of 405256223100 in words is "four hundred five billion, two hundred fifty-six million, two hundred twenty-three thousand, one hundred".