205381512 has 48 divisors (see below), whose sum is σ = 635706240. Its totient is φ = 58680288.

The previous prime is 205381511. The next prime is 205381531. The reversal of 205381512 is 215183502.

It is a happy number.

205381512 is a `hidden beast` number, since 20 + 53 + 81 + 512 = 666.

It is a super-2 number, since 2×205381512² = 84363130942812288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205381511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203248 + ... + 204255.

It is an arithmetic number, because the mean of its divisors is an integer number (13243880).

Almost surely, 2^205381512 is an apocalyptic number.

It is an amenable number.

205381512 is an abundant number, since it is smaller than the sum of its proper divisors (430324728).

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

205381512 is a wasteful number, since it uses less digits than its factorization.

205381512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407522 (or 407515 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 205381512 is about 14331.1378473588. The cubic root of 205381512 is about 590.0024054292.

The spelling of 205381512 in words is "two hundred five million, three hundred eighty-one thousand, five hundred twelve".