272109621 has 16 divisors (see below), whose sum is σ = 436467200. Its totient is φ = 147307248.

The previous prime is 272109601. The next prime is 272109641. The reversal of 272109621 is 126901272.

It is an interprime number because it is at equal distance from previous prime (272109601) and next prime (272109641).

It is not a de Polignac number, because 272109621 - 2⁵ = 272109589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (272109601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340591 + ... + 341388.

It is an arithmetic number, because the mean of its divisors is an integer number (27279200).

Almost surely, 2^272109621 is an apocalyptic number.

272109621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

272109621 is a deficient number, since it is larger than the sum of its proper divisors (164357579).

272109621 is a wasteful number, since it uses less digits than its factorization.

272109621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682008.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 272109621 is about 16495.7455424118. The cubic root of 272109621 is about 648.0093901055.

The spelling of 272109621 in words is "two hundred seventy-two million, one hundred nine thousand, six hundred twenty-one".