631513652 has 96 divisors (see below), whose sum is σ = 1445520384. Its totient is φ = 234259200.

The previous prime is 631513643. The next prime is 631513661. The reversal of 631513652 is 256315136.

It is an interprime number because it is at equal distance from previous prime (631513643) and next prime (631513661).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 542423 + ... + 543585.

It is an arithmetic number, because the mean of its divisors is an integer number (15057504).

Almost surely, 2^631513652 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631513652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (722760192).

631513652 is an abundant number, since it is smaller than the sum of its proper divisors (814006732).

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

631513652 is a wasteful number, since it uses less digits than its factorization.

631513652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269 (or 1267 counting only the distinct ones).

The product of its digits is 16200, while the sum is 32.

The square root of 631513652 is about 25129.9353759615. The cubic root of 631513652 is about 857.9478979379.

Adding to 631513652 its reverse (256315136), we get a palindrome (887828788).

The spelling of 631513652 in words is "six hundred thirty-one million, five hundred thirteen thousand, six hundred fifty-two".