31430244478 has 16 divisors (see below), whose sum is σ = 47213400960. Its totient is φ = 15692463000.

The previous prime is 31430244463. The next prime is 31430244497. The reversal of 31430244478 is 87444203413.

It is a self number, because there is not a number n which added to its sum of digits gives 31430244478.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5106703 + ... + 5112853.

It is an arithmetic number, because the mean of its divisors is an integer number (2950837560).

Almost surely, 2^31430244478 is an apocalyptic number.

31430244478 is a deficient number, since it is larger than the sum of its proper divisors (15783156482).

31430244478 is a wasteful number, since it uses less digits than its factorization.

31430244478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9423.

The product of its (nonzero) digits is 258048, while the sum is 40.

The spelling of 31430244478 in words is "thirty-one billion, four hundred thirty million, two hundred forty-four thousand, four hundred seventy-eight".