31225540015200 has 144 divisors (see below), whose sum is σ = 101774477016576. Its totient is φ = 8315722560000.

The previous prime is 31225540015199. The next prime is 31225540015207. The reversal of 31225540015200 is 251004552213.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31225540015207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6859812 + ... + 10464611.

It is an arithmetic number, because the mean of its divisors is an integer number (706767201504).

Almost surely, 2^{31225540015200} is an apocalyptic number.

31225540015200 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31225540015200 is an abundant number, since it is smaller than the sum of its proper divisors (70548937001376).

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

31225540015200 is a wasteful number, since it uses less digits than its factorization.

31225540015200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17325197 (or 17325184 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 31225540015200 its reverse (251004552213), we get a palindrome (31476544567413).

The spelling of 31225540015200 in words is "thirty-one trillion, two hundred twenty-five billion, five hundred forty million, fifteen thousand, two hundred".