405225293 has 16 divisors (see below), whose sum is σ = 485568000. Its totient is φ = 333820080.

The previous prime is 405225287. The next prime is 405225307. The reversal of 405225293 is 392522504.

It is not a de Polignac number, because 405225293 - 2⁶ = 405225229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405225283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37343 + ... + 46956.

It is an arithmetic number, because the mean of its divisors is an integer number (30348000).

Almost surely, 2^405225293 is an apocalyptic number.

It is an amenable number.

405225293 is a deficient number, since it is larger than the sum of its proper divisors (80342707).

405225293 is a wasteful number, since it uses less digits than its factorization.

405225293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84352.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 405225293 is about 20130.2084688659. The cubic root of 405225293 is about 740.0007870700. Note that the first 3 decimals are identical.

Adding to 405225293 its reverse (392522504), we get a palindrome (797747797).

The spelling of 405225293 in words is "four hundred five million, two hundred twenty-five thousand, two hundred ninety-three".