205155342 has 80 divisors (see below), whose sum is σ = 530351712. Its totient is φ = 58060800.

The previous prime is 205155311. The next prime is 205155373. The reversal of 205155342 is 243551502.

It is a happy number.

205155342 is a `hidden beast` number, since 20 + 51 + 553 + 42 = 666.

It is an interprime number because it is at equal distance from previous prime (205155311) and next prime (205155373).

It is a super-2 number, since 2×205155342² = 84177428702273928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 127342 + ... + 128942.

Almost surely, 2^205155342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205155342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265175856).

205155342 is an abundant number, since it is smaller than the sum of its proper divisors (325196370).

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

205155342 is a wasteful number, since it uses less digits than its factorization.

205155342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735 (or 1726 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 205155342 is about 14323.2448139379. The cubic root of 205155342 is about 589.7857519514.

The spelling of 205155342 in words is "two hundred five million, one hundred fifty-five thousand, three hundred forty-two".