206113553 has 4 divisors (see below), whose sum is σ = 206412528. Its totient is φ = 205814580.

The previous prime is 206113547. The next prime is 206113591. The reversal of 206113553 is 355311602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206113553 - 2¹² = 206109457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206113543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148451 + ... + 149832.

It is an arithmetic number, because the mean of its divisors is an integer number (51603132).

Almost surely, 2^206113553 is an apocalyptic number.

It is an amenable number.

206113553 is a deficient number, since it is larger than the sum of its proper divisors (298975).

206113553 is an equidigital number, since it uses as much as digits as its factorization.

206113553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298974.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 206113553 is about 14356.6553556182. The cubic root of 206113553 is about 590.7025557871.

The spelling of 206113553 in words is "two hundred six million, one hundred thirteen thousand, five hundred fifty-three".