31421043123400 has 96 divisors (see below), whose sum is σ = 83627748195840. Its totient is φ = 10755180956160.

The previous prime is 31421043123373. The next prime is 31421043123413. The reversal of 31421043123400 is 432134012413.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

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, 17637517 + ... + 19337116.

It is an arithmetic number, because the mean of its divisors is an integer number (871122377040).

Almost surely, 2^{31421043123400} is an apocalyptic number.

It is an amenable number.

31421043123400 is an abundant number, since it is smaller than the sum of its proper divisors (52206705072440).

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

31421043123400 is a wasteful number, since it uses less digits than its factorization.

31421043123400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36975263 (or 36975254 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 31421043123400 its reverse (432134012413), we get a palindrome (31853177135813).

The spelling of 31421043123400 in words is "thirty-one trillion, four hundred twenty-one billion, forty-three million, one hundred twenty-three thousand, four hundred".