31430220044 has 6 divisors (see below), whose sum is σ = 55002885084. Its totient is φ = 15715110020.

The previous prime is 31430220037. The next prime is 31430220047. The reversal of 31430220044 is 44002203413.

It is not an unprimeable number, because it can be changed into a prime (31430220047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3928777502 + ... + 3928777509.

It is an arithmetic number, because the mean of its divisors is an integer number (9167147514).

Almost surely, 2^31430220044 is an apocalyptic number.

It is an amenable number.

31430220044 is a deficient number, since it is larger than the sum of its proper divisors (23572665040).

31430220044 is a wasteful number, since it uses less digits than its factorization.

31430220044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7857555015 (or 7857555013 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 31430220044 its reverse (44002203413), we get a palindrome (75432423457).

The spelling of 31430220044 in words is "thirty-one billion, four hundred thirty million, two hundred twenty thousand, forty-four".