31404431330 has 32 divisors (see below), whose sum is σ = 61126638336. Its totient is φ = 11571291904.

The previous prime is 31404431293. The next prime is 31404431351. The reversal of 31404431330 is 3313440413.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31404431330.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1957244 + ... + 1973223.

It is an arithmetic number, because the mean of its divisors is an integer number (1910207448).

Almost surely, 2^31404431330 is an apocalyptic number.

31404431330 is a deficient number, since it is larger than the sum of its proper divisors (29722207006).

31404431330 is a wasteful number, since it uses less digits than its factorization.

31404431330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930538.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 31404431330 its reverse (3313440413), we get a palindrome (34717871743).

The spelling of 31404431330 in words is "thirty-one billion, four hundred four million, four hundred thirty-one thousand, three hundred thirty".