631015242 has 144 divisors (see below), whose sum is σ = 1553801760. Its totient is φ = 170501760.

The previous prime is 631015241. The next prime is 631015247. The reversal of 631015242 is 242510136.

It is not an unprimeable number, because it can be changed into a prime (631015241) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4539609 + ... + 4539747.

It is an arithmetic number, because the mean of its divisors is an integer number (10790290).

Almost surely, 2^631015242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631015242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (776900880).

631015242 is an abundant number, since it is smaller than the sum of its proper divisors (922786518).

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

631015242 is a wasteful number, since it uses less digits than its factorization.

631015242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 631015242 is about 25120.0167595485. The cubic root of 631015242 is about 857.7221322430.

Adding to 631015242 its reverse (242510136), we get a palindrome (873525378).

The spelling of 631015242 in words is "six hundred thirty-one million, fifteen thousand, two hundred forty-two".