31213331430 has 32 divisors (see below), whose sum is σ = 75043692000. Its totient is φ = 8308922112.

The previous prime is 31213331411. The next prime is 31213331431. The reversal of 31213331430 is 3413331213.

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 31213331430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213331431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 897205 + ... + 931344.

It is an arithmetic number, because the mean of its divisors is an integer number (2345115375).

Almost surely, 2^31213331430 is an apocalyptic number.

31213331430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31213331430 is an abundant number, since it is smaller than the sum of its proper divisors (43830360570).

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

31213331430 is a wasteful number, since it uses less digits than its factorization.

31213331430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829128.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 31213331430 its reverse (3413331213), we get a palindrome (34626662643).

The spelling of 31213331430 in words is "thirty-one billion, two hundred thirteen million, three hundred thirty-one thousand, four hundred thirty".