31213143430 has 16 divisors (see below), whose sum is σ = 64209895200. Its totient is φ = 10701649152.

The previous prime is 31213143413. The next prime is 31213143443. The reversal of 31213143430 is 3434131213.

It is a junction number, because it is equal to n+sod(n) for n = 31213143395 and 31213143404.

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, 222950955 + ... + 222951094.

It is an arithmetic number, because the mean of its divisors is an integer number (4013118450).

Almost surely, 2^31213143430 is an apocalyptic number.

31213143430 is an abundant number, since it is smaller than the sum of its proper divisors (32996751770).

31213143430 is a wasteful number, since it uses less digits than its factorization.

31213143430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445902063.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31213143430 its reverse (3434131213), we get a palindrome (34647274643).

The spelling of 31213143430 in words is "thirty-one billion, two hundred thirteen million, one hundred forty-three thousand, four hundred thirty".