31232201240 has 32 divisors (see below), whose sum is σ = 71767615680. Its totient is φ = 12227073792.

The previous prime is 31232201207. The next prime is 31232201243. The reversal of 31232201240 is 4210223213.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31232201243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8304557 + ... + 8308316.

It is an arithmetic number, because the mean of its divisors is an integer number (2242737990).

Almost surely, 2^31232201240 is an apocalyptic number.

It is an amenable number.

31232201240 is an abundant number, since it is smaller than the sum of its proper divisors (40535414440).

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

31232201240 is a wasteful number, since it uses less digits than its factorization.

31232201240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16612931 (or 16612927 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31232201240 its reverse (4210223213), we get a palindrome (35442424453).

The spelling of 31232201240 in words is "thirty-one billion, two hundred thirty-two million, two hundred one thousand, two hundred forty".