31240324213400 has 96 divisors (see below), whose sum is σ = 80250081121440. Its totient is φ = 11249712629760.

The previous prime is 31240324213381. The next prime is 31240324213409. The reversal of 31240324213400 is 431242304213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31240324213409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199668119 + ... + 199824518.

It is an arithmetic number, because the mean of its divisors is an integer number (835938345015).

Almost surely, 2^{31240324213400} is an apocalyptic number.

It is an amenable number.

31240324213400 is an abundant number, since it is smaller than the sum of its proper divisors (49009756908040).

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

31240324213400 is a wasteful number, since it uses less digits than its factorization.

31240324213400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399492693 (or 399492684 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 31240324213400 its reverse (431242304213), we get a palindrome (31671566517613).

The spelling of 31240324213400 in words is "thirty-one trillion, two hundred forty billion, three hundred twenty-four million, two hundred thirteen thousand, four hundred".