405225434321 has 4 divisors (see below), whose sum is σ = 405228478644. Its totient is φ = 405222390000.

The previous prime is 405225434281. The next prime is 405225434329. The reversal of 405225434321 is 123434522504.

It is a happy number.

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 330666401296 + 74559033025 = 575036^2 + 273055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405225434321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405225434329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1312910 + ... + 1591911.

It is an arithmetic number, because the mean of its divisors is an integer number (101307119661).

Almost surely, 2^405225434321 is an apocalyptic number.

It is an amenable number.

405225434321 is a deficient number, since it is larger than the sum of its proper divisors (3044323).

405225434321 is a wasteful number, since it uses less digits than its factorization.

405225434321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044322.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 405225434321 its reverse (123434522504), we get a palindrome (528659956825).

The spelling of 405225434321 in words is "four hundred five billion, two hundred twenty-five million, four hundred thirty-four thousand, three hundred twenty-one".