205851492 has 216 divisors, whose sum is σ = 673120448. Its totient is φ = 51891840.

The previous prime is 205851479. The next prime is 205851497. The reversal of 205851492 is 294158502.

205851492 is a `hidden beast` number, since 2 + 0 + 58 + 514 + 92 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (205851497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1311078 + ... + 1311234.

Almost surely, 2^205851492 is an apocalyptic number.

205851492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205851492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336560224).

205851492 is an abundant number, since it is smaller than the sum of its proper divisors (467268956).

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

205851492 is a wasteful number, since it uses less digits than its factorization.

205851492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 205851492 is about 14347.5256403326. The cubic root of 205851492 is about 590.4521020073.

The spelling of 205851492 in words is "two hundred five million, eight hundred fifty-one thousand, four hundred ninety-two".