313131140421 has 32 divisors (see below), whose sum is σ = 466274378880. Its totient is φ = 185323392000.

The previous prime is 313131140417. The next prime is 313131140431. The reversal of 313131140421 is 124041131313.

It is a happy number.

It is not a de Polignac number, because 313131140421 - 2² = 313131140417 is a prime.

It is a super-2 number, since 2×313131140421² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 313131140391 and 313131140400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313131140431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400176 + ... + 886793.

It is an arithmetic number, because the mean of its divisors is an integer number (14571074340).

Almost surely, 2^313131140421 is an apocalyptic number.

It is an amenable number.

313131140421 is a deficient number, since it is larger than the sum of its proper divisors (153143238459).

313131140421 is a wasteful number, since it uses less digits than its factorization.

313131140421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287157.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 313131140421 its reverse (124041131313), we get a palindrome (437172271734).

The spelling of 313131140421 in words is "three hundred thirteen billion, one hundred thirty-one million, one hundred forty thousand, four hundred twenty-one".