206113621 has 8 divisors (see below), whose sum is σ = 235746560. Its totient is φ = 176527728.

The previous prime is 206113619. The next prime is 206113631. The reversal of 206113621 is 126311602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206113621 - 2¹ = 206113619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206113592 and 206113601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206113631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1806 + ... + 20383.

It is an arithmetic number, because the mean of its divisors is an integer number (29468320).

Almost surely, 2^206113621 is an apocalyptic number.

It is an amenable number.

206113621 is a deficient number, since it is larger than the sum of its proper divisors (29632939).

206113621 is a wasteful number, since it uses less digits than its factorization.

206113621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23523.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 206113621 is about 14356.6577238576. The cubic root of 206113621 is about 590.7026207476.

The spelling of 206113621 in words is "two hundred six million, one hundred thirteen thousand, six hundred twenty-one".