206622455 has 16 divisors (see below), whose sum is σ = 278631360. Its totient is φ = 145947648.

The previous prime is 206622443. The next prime is 206622469. The reversal of 206622455 is 554226602.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206622455 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67610 + ... + 70599.

It is an arithmetic number, because the mean of its divisors is an integer number (17414460).

Almost surely, 2^206622455 is an apocalyptic number.

206622455 is a deficient number, since it is larger than the sum of its proper divisors (72008905).

206622455 is a wasteful number, since it uses less digits than its factorization.

206622455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138250.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 206622455 is about 14374.3679861064. The cubic root of 206622455 is about 591.1883117227.

The spelling of 206622455 in words is "two hundred six million, six hundred twenty-two thousand, four hundred fifty-five".