205221325531 has 8 divisors (see below), whose sum is σ = 207140085200. Its totient is φ = 203310611712.

The previous prime is 205221325501. The next prime is 205221325541. The reversal of 205221325531 is 135523122502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205221325531 - 2²³ = 205212936923 is a prime.

It is a super-2 number, since 2×205221325531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205221325493 and 205221325502.

It is not an unprimeable number, because it can be changed into a prime (205221325501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1960206 + ... + 2062243.

It is an arithmetic number, because the mean of its divisors is an integer number (25892510650).

Almost surely, 2^205221325531 is an apocalyptic number.

205221325531 is a deficient number, since it is larger than the sum of its proper divisors (1918759669).

205221325531 is a wasteful number, since it uses less digits than its factorization.

205221325531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022925.

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 205221325531 in words is "two hundred five billion, two hundred twenty-one million, three hundred twenty-five thousand, five hundred thirty-one".