650531520 has 448 divisors, whose sum is σ = 2510576640. Its totient is φ = 157925376.

The previous prime is 650531513. The next prime is 650531549. The reversal of 650531520 is 25135056.

650531520 is a `hidden beast` number, since 6 + 505 + 3 + 152 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6315789 + ... + 6315891.

Almost surely, 2^650531520 is an apocalyptic number.

650531520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 650531520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1255288320).

650531520 is an abundant number, since it is smaller than the sum of its proper divisors (1860045120).

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

650531520 is a wasteful number, since it uses less digits than its factorization.

650531520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 650531520 is about 25505.5194026705. The cubic root of 650531520 is about 866.4751555802.

Adding to 650531520 its reverse (25135056), we get a palindrome (675666576).

It can be divided in two parts, 6505 and 31520, that added together give a square (38025 = 195²).

The spelling of 650531520 in words is "six hundred fifty million, five hundred thirty-one thousand, five hundred twenty".