631345452 has 48 divisors (see below), whose sum is σ = 1566714240. Its totient is φ = 197309952.

The previous prime is 631345447. The next prime is 631345483. The reversal of 631345452 is 254543136.

It is a super-2 number, since 2×631345452² = 797194159522168608, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7843 + ... + 36389.

It is an arithmetic number, because the mean of its divisors is an integer number (32639880).

Almost surely, 2^631345452 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 631345452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (783357120).

631345452 is an abundant number, since it is smaller than the sum of its proper divisors (935368788).

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

631345452 is a wasteful number, since it uses less digits than its factorization.

631345452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28670 (or 28668 counting only the distinct ones).

The product of its digits is 43200, while the sum is 33.

The square root of 631345452 is about 25126.5885467964. The cubic root of 631345452 is about 857.8717213582.

Adding to 631345452 its reverse (254543136), we get a palindrome (885888588).

It can be divided in two parts, 63134 and 5452, that added together give a palindrome (68586).

The spelling of 631345452 in words is "six hundred thirty-one million, three hundred forty-five thousand, four hundred fifty-two".