31551134342 has 128 divisors (see below), whose sum is σ = 63300787200. Its totient is φ = 11446272000.

The previous prime is 31551134339. The next prime is 31551134359. The reversal of 31551134342 is 24343115513.

It is a junction number, because it is equal to n+sod(n) for n = 31551134299 and 31551134308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19706342 + ... + 19707942.

It is an arithmetic number, because the mean of its divisors is an integer number (494537400).

Almost surely, 2^31551134342 is an apocalyptic number.

31551134342 is an abundant number, since it is smaller than the sum of its proper divisors (31749652858).

31551134342 is a wasteful number, since it uses less digits than its factorization.

31551134342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822.

The product of its digits is 21600, while the sum is 32.

Adding to 31551134342 its reverse (24343115513), we get a palindrome (55894249855).

The spelling of 31551134342 in words is "thirty-one billion, five hundred fifty-one million, one hundred thirty-four thousand, three hundred forty-two".