31430220100 has 18 divisors (see below), whose sum is σ = 68203577834. Its totient is φ = 12572088000.

The previous prime is 31430220047. The next prime is 31430220119. The reversal of 31430220100 is 102203413.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 425349376 + 31004870724 = 20624^2 + 176082^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 157151001 + ... + 157151200.

Almost surely, 2^31430220100 is an apocalyptic number.

It is an amenable number.

31430220100 is an abundant number, since it is smaller than the sum of its proper divisors (36773357734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31430220100 is a wasteful number, since it uses less digits than its factorization.

31430220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314302215 (or 314302208 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31430220100 its reverse (102203413), we get a palindrome (31532423513).

The spelling of 31430220100 in words is "thirty-one billion, four hundred thirty million, two hundred twenty thousand, one hundred".