206542553 has 32 divisors (see below), whose sum is σ = 263208960. Its totient is φ = 158114880.

The previous prime is 206542517. The next prime is 206542603. The reversal of 206542553 is 355245602.

It is not a de Polignac number, because 206542553 - 2¹⁸ = 206280409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206542153) 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, 144026 + ... + 145452.

It is an arithmetic number, because the mean of its divisors is an integer number (8225280).

Almost surely, 2^206542553 is an apocalyptic number.

206542553 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

206542553 is a deficient number, since it is larger than the sum of its proper divisors (56666407).

206542553 is a wasteful number, since it uses less digits than its factorization.

206542553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517.

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 206542553 is about 14371.5883951636. The cubic root of 206542553 is about 591.1120966783.

The spelling of 206542553 in words is "two hundred six million, five hundred forty-two thousand, five hundred fifty-three".