205522040 has 32 divisors (see below), whose sum is σ = 463477680. Its totient is φ = 82021632.

The previous prime is 205522039. The next prime is 205522081. The reversal of 205522040 is 40225502.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12659 + ... + 23901.

Almost surely, 2^205522040 is an apocalyptic number.

205522040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205522040 is an abundant number, since it is smaller than the sum of its proper divisors (257955640).

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

205522040 is a wasteful number, since it uses less digits than its factorization.

205522040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11711 (or 11707 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 205522040 is about 14336.0398994980. The cubic root of 205522040 is about 590.1369403478.

Adding to 205522040 its reverse (40225502), we get a palindrome (245747542).

The spelling of 205522040 in words is "two hundred five million, five hundred twenty-two thousand, forty".