206440455 has 32 divisors (see below), whose sum is σ = 357739200. Its totient is φ = 101053440.

The previous prime is 206440417. The next prime is 206440457. The reversal of 206440455 is 554044602.

It is not a de Polignac number, because 206440455 - 2¹³ = 206432263 is a prime.

It is a super-2 number, since 2×206440455² = 85235322921214050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206440457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32371 + ... + 38219.

It is an arithmetic number, because the mean of its divisors is an integer number (11179350).

Almost surely, 2^206440455 is an apocalyptic number.

206440455 is a deficient number, since it is larger than the sum of its proper divisors (151298745).

206440455 is a wasteful number, since it uses less digits than its factorization.

206440455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6051.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 206440455 is about 14368.0358782960. The cubic root of 206440455 is about 591.0146812240.

The spelling of 206440455 in words is "two hundred six million, four hundred forty thousand, four hundred fifty-five".