655404211 has 16 divisors (see below), whose sum is σ = 824774400. Its totient is φ = 505925280.

The previous prime is 655404209. The next prime is 655404223. The reversal of 655404211 is 112404556.

It is not a de Polignac number, because 655404211 - 2¹ = 655404209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 655404211.

It is not an unprimeable number, because it can be changed into a prime (655404241) 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, 31536 + ... + 48013.

It is an arithmetic number, because the mean of its divisors is an integer number (51548400).

Almost surely, 2^655404211 is an apocalyptic number.

655404211 is a deficient number, since it is larger than the sum of its proper divisors (169370189).

655404211 is a wasteful number, since it uses less digits than its factorization.

655404211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79674.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 655404211 is about 25600.8634815312. The cubic root of 655404211 is about 868.6331692796.

Adding to 655404211 its reverse (112404556), we get a palindrome (767808767).

It can be divided in two parts, 65540 and 4211, that added together give a triangular number (69751 = T₃₇₃).

The spelling of 655404211 in words is "six hundred fifty-five million, four hundred four thousand, two hundred eleven".