650820531 has 4 divisors (see below), whose sum is σ = 867760712. Its totient is φ = 433880352.

The previous prime is 650820487. The next prime is 650820539. The reversal of 650820531 is 135028056.

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

It is not a de Polignac number, because 650820531 - 2¹⁵ = 650787763 is a prime.

It is a super-2 number, since 2×650820531² = 847134727142243922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650820539) 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, 108470086 + ... + 108470091.

It is an arithmetic number, because the mean of its divisors is an integer number (216940178).

Almost surely, 2^650820531 is an apocalyptic number.

650820531 is a deficient number, since it is larger than the sum of its proper divisors (216940181).

650820531 is a wasteful number, since it uses less digits than its factorization.

650820531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216940180.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 650820531 is about 25511.1844295791. The cubic root of 650820531 is about 866.6034526050.

Adding to 650820531 its reverse (135028056), we get a palindrome (785848587).

The spelling of 650820531 in words is "six hundred fifty million, eight hundred twenty thousand, five hundred thirty-one".