31434232321 has 8 divisors (see below), whose sum is σ = 31499677440. Its totient is φ = 31368853968.

The previous prime is 31434232261. The next prime is 31434232351. The reversal of 31434232321 is 12323243413.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31434232321 is a prime.

It is a super-2 number, since 2×31434232321² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31434232321.

It is not an unprimeable number, because it can be changed into a prime (31434232351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 987760 + ... + 1019086.

It is an arithmetic number, because the mean of its divisors is an integer number (3937459680).

Almost surely, 2^31434232321 is an apocalyptic number.

It is an amenable number.

31434232321 is a deficient number, since it is larger than the sum of its proper divisors (65445119).

31434232321 is a wasteful number, since it uses less digits than its factorization.

31434232321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33383.

The product of its digits is 10368, while the sum is 28.

Adding to 31434232321 its reverse (12323243413), we get a palindrome (43757475734).

The spelling of 31434232321 in words is "thirty-one billion, four hundred thirty-four million, two hundred thirty-two thousand, three hundred twenty-one".