31320404001231 has 4 divisors (see below), whose sum is σ = 41760538668312. Its totient is φ = 20880269334152.

The previous prime is 31320404001217. The next prime is 31320404001251. The reversal of 31320404001231 is 13210040402313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31320404001231 - 2¹⁷ = 31320403870159 is a prime.

It is a super-2 number, since 2×31320404001231² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320404001251) 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 3 ways as a sum of consecutive naturals, for example, 5220067333536 + ... + 5220067333541.

It is an arithmetic number, because the mean of its divisors is an integer number (10440134667078).

Almost surely, 2^{31320404001231} is an apocalyptic number.

31320404001231 is a deficient number, since it is larger than the sum of its proper divisors (10440134667081).

31320404001231 is a wasteful number, since it uses less digits than its factorization.

31320404001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10440134667080.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31320404001231 its reverse (13210040402313), we get a palindrome (44530444403544).

The spelling of 31320404001231 in words is "thirty-one trillion, three hundred twenty billion, four hundred four million, one thousand, two hundred thirty-one".