31401224443420 has 48 divisors (see below), whose sum is σ = 71015621866560. Its totient is φ = 11594209268736.

The previous prime is 31401224443367. The next prime is 31401224443429. The reversal of 31401224443420 is 2434442210413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401224443429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40388916 + ... + 41159044.

It is an arithmetic number, because the mean of its divisors is an integer number (1479492122220).

Almost surely, 2^{31401224443420} is an apocalyptic number.

It is an amenable number.

31401224443420 is an abundant number, since it is smaller than the sum of its proper divisors (39614397423140).

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

31401224443420 is a wasteful number, since it uses less digits than its factorization.

31401224443420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926974 (or 926972 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 31401224443420 its reverse (2434442210413), we get a palindrome (33835666653833).

The spelling of 31401224443420 in words is "thirty-one trillion, four hundred one billion, two hundred twenty-four million, four hundred forty-three thousand, four hundred twenty".