63231140 has 96 divisors (see below), whose sum is σ = 161118720. Its totient is φ = 20376576.

The previous prime is 63231139. The next prime is 63231149. The reversal of 63231140 is 4113236.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (63231149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 234926 + ... + 235194.

It is an arithmetic number, because the mean of its divisors is an integer number (1678320).

Almost surely, 2^63231140 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 63231140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80559360).

63231140 is an abundant number, since it is smaller than the sum of its proper divisors (97887580).

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

63231140 is a wasteful number, since it uses less digits than its factorization.

63231140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 63231140 is about 7951.8010538494. The cubic root of 63231140 is about 398.3917508359.

Adding to 63231140 its reverse (4113236), we get a palindrome (67344376).

The spelling of 63231140 in words is "sixty-three million, two hundred thirty-one thousand, one hundred forty".