531650905 has 4 divisors (see below), whose sum is σ = 637981092. Its totient is φ = 425320720.

The previous prime is 531650869. The next prime is 531650909. The reversal of 531650905 is 509056135.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 365421456 + 166229449 = 19116^2 + 12893^2 .

It is not a de Polignac number, because 531650905 - 2⁹ = 531650393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531650909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53165086 + ... + 53165095.

It is an arithmetic number, because the mean of its divisors is an integer number (159495273).

Almost surely, 2^531650905 is an apocalyptic number.

It is an amenable number.

531650905 is a deficient number, since it is larger than the sum of its proper divisors (106330187).

531650905 is a wasteful number, since it uses less digits than its factorization.

531650905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106330186.

The product of its (nonzero) digits is 20250, while the sum is 34.

The square root of 531650905 is about 23057.5563536121. The cubic root of 531650905 is about 810.1066287509.

The spelling of 531650905 in words is "five hundred thirty-one million, six hundred fifty thousand, nine hundred five".