205420572 has 72 divisors (see below), whose sum is σ = 613922400. Its totient is φ = 56665728.

The previous prime is 205420549. The next prime is 205420573. The reversal of 205420572 is 275024502.

205420572 is a `hidden beast` number, since 20 + 54 + 20 + 572 = 666.

205420572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×205420572² = 84395222801614368, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205420573) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6747 + ... + 21362.

It is an arithmetic number, because the mean of its divisors is an integer number (8526700).

Almost surely, 2^205420572 is an apocalyptic number.

It is an amenable number.

205420572 is an abundant number, since it is smaller than the sum of its proper divisors (408501828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205420572 is a wasteful number, since it uses less digits than its factorization.

205420572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28155 (or 28150 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 205420572 is about 14332.5005494505. The cubic root of 205420572 is about 590.0398057985.

The spelling of 205420572 in words is "two hundred five million, four hundred twenty thousand, five hundred seventy-two".