63131340 has 96 divisors (see below), whose sum is σ = 183988224. Its totient is φ = 16162560.

The previous prime is 63131329. The next prime is 63131399. The reversal of 63131340 is 4313136.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171837 + ... + 172203.

It is an arithmetic number, because the mean of its divisors is an integer number (1916544).

Almost surely, 2^63131340 is an apocalyptic number.

63131340 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 63131340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91994112).

63131340 is an abundant number, since it is smaller than the sum of its proper divisors (120856884).

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

63131340 is a wasteful number, since it uses less digits than its factorization.

63131340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 63131340 is about 7945.5232678534. The cubic root of 63131340 is about 398.1820417535.

Adding to 63131340 its reverse (4313136), we get a palindrome (67444476).

The spelling of 63131340 in words is "sixty-three million, one hundred thirty-one thousand, three hundred forty".