31220402434 has 16 divisors (see below), whose sum is σ = 50904298368. Its totient is φ = 14274747792.

The previous prime is 31220402401. The next prime is 31220402459. The reversal of 31220402434 is 43420402213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31220402399 and 31220402408.

It is an unprimeable number.

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, 5608362 + ... + 5613925.

It is an arithmetic number, because the mean of its divisors is an integer number (3181518648).

Almost surely, 2^31220402434 is an apocalyptic number.

31220402434 is a deficient number, since it is larger than the sum of its proper divisors (19683895934).

31220402434 is a wasteful number, since it uses less digits than its factorization.

31220402434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11222409.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 31220402434 its reverse (43420402213), we get a palindrome (74640804647).

The spelling of 31220402434 in words is "thirty-one billion, two hundred twenty million, four hundred two thousand, four hundred thirty-four".