31313011431 has 16 divisors (see below), whose sum is σ = 45155257056. Its totient is φ = 19186838016.

The previous prime is 31313011409. The next prime is 31313011439. The reversal of 31313011431 is 13411031313.

It is not a de Polignac number, because 31313011431 - 2¹⁴ = 31312995047 is a prime.

It is a super-2 number, since 2×31313011431² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31313011398 and 31313011407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313011439) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1713870 + ... + 1732043.

It is an arithmetic number, because the mean of its divisors is an integer number (2822203566).

Almost surely, 2^31313011431 is an apocalyptic number.

31313011431 is a deficient number, since it is larger than the sum of its proper divisors (13842245625).

31313011431 is a wasteful number, since it uses less digits than its factorization.

31313011431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3446162.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 31313011431 its reverse (13411031313), we get a palindrome (44724042744).

The spelling of 31313011431 in words is "thirty-one billion, three hundred thirteen million, eleven thousand, four hundred thirty-one".