31211131430 has 16 divisors (see below), whose sum is σ = 56811274560. Its totient is φ = 12344177472.

The previous prime is 31211131409. The next prime is 31211131433. The reversal of 31211131430 is 3413111213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211131433) 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 7 ways as a sum of consecutive naturals, for example, 17533454 + ... + 17535233.

It is an arithmetic number, because the mean of its divisors is an integer number (3550704660).

Almost surely, 2^31211131430 is an apocalyptic number.

31211131430 is a deficient number, since it is larger than the sum of its proper divisors (25600143130).

31211131430 is a wasteful number, since it uses less digits than its factorization.

31211131430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35068783.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31211131430 its reverse (3413111213), we get a palindrome (34624242643).

The spelling of 31211131430 in words is "thirty-one billion, two hundred eleven million, one hundred thirty-one thousand, four hundred thirty".