205622540 has 48 divisors (see below), whose sum is σ = 441860832. Its totient is φ = 80357376.

The previous prime is 205622537. The next prime is 205622587. The reversal of 205622540 is 45226502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160382 + ... + 161658.

It is an arithmetic number, because the mean of its divisors is an integer number (9205434).

Almost surely, 2^205622540 is an apocalyptic number.

205622540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205622540 is an abundant number, since it is smaller than the sum of its proper divisors (236238292).

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

205622540 is a wasteful number, since it uses less digits than its factorization.

205622540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466 (or 1464 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 205622540 is about 14339.5446231741. The cubic root of 205622540 is about 590.2331167284.

The spelling of 205622540 in words is "two hundred five million, six hundred twenty-two thousand, five hundred forty".