205051572 has 72 divisors (see below), whose sum is σ = 595227360. Its totient is φ = 58864320.

The previous prime is 205051571. The next prime is 205051573. The reversal of 205051572 is 275150502.

It is a happy number.

205051572 is a `hidden beast` number, since 2 + 0 + 505 + 157 + 2 = 666.

205051572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (205051571) and next prime (205051573).

It is a super-2 number, since 2×205051572² = 84092294359342368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205051571) 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, 6103 + ... + 21150.

Almost surely, 2^205051572 is an apocalyptic number.

205051572 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

205051572 is an abundant number, since it is smaller than the sum of its proper divisors (390175788).

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

205051572 is a wasteful number, since it uses less digits than its factorization.

205051572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27293 (or 27288 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 205051572 is about 14319.6219223833. The cubic root of 205051572 is about 589.6862949762.

The spelling of 205051572 in words is "two hundred five million, fifty-one thousand, five hundred seventy-two".