406520255 has 4 divisors (see below), whose sum is σ = 487824312. Its totient is φ = 325216200.

The previous prime is 406520197. The next prime is 406520263. The reversal of 406520255 is 552025604.

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

It is a de Polignac number, because none of the positive numbers 2^k-406520255 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40652021 + ... + 40652030.

It is an arithmetic number, because the mean of its divisors is an integer number (121956078).

Almost surely, 2^406520255 is an apocalyptic number.

406520255 is a deficient number, since it is larger than the sum of its proper divisors (81304057).

406520255 is an equidigital number, since it uses as much as digits as its factorization.

406520255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81304056.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 406520255 is about 20162.3474575755. The cubic root of 406520255 is about 740.7882123640.

Adding to 406520255 its reverse (552025604), we get a palindrome (958545859).

The spelling of 406520255 in words is "four hundred six million, five hundred twenty thousand, two hundred fifty-five".