205921412 has 18 divisors (see below), whose sum is σ = 363585978. Its totient is φ = 102042432.

The previous prime is 205921409. The next prime is 205921433. The reversal of 205921412 is 214129502.

205921412 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 17023876 + 188897536 = 4126^2 + 13744^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 335618 + ... + 336230.

It is an arithmetic number, because the mean of its divisors is an integer number (20199221).

Almost surely, 2^205921412 is an apocalyptic number.

It is an amenable number.

205921412 is a deficient number, since it is larger than the sum of its proper divisors (157664566).

205921412 is an equidigital number, since it uses as much as digits as its factorization.

205921412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 205921412 is about 14349.9620905423. The cubic root of 205921412 is about 590.5189458879.

The spelling of 205921412 in words is "two hundred five million, nine hundred twenty-one thousand, four hundred twelve".