31421342433 has 8 divisors (see below), whose sum is σ = 45117825088. Its totient is φ = 19336210704.

The previous prime is 31421342413. The next prime is 31421342489. The reversal of 31421342433 is 33424312413.

It is a happy number.

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

It is not a de Polignac number, because 31421342433 - 2²⁵ = 31387788001 is a prime.

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 31421342433.

It is not an unprimeable number, because it can be changed into a prime (31421342413) 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, 402837685 + ... + 402837762.

It is an arithmetic number, because the mean of its divisors is an integer number (5639728136).

Almost surely, 2^31421342433 is an apocalyptic number.

It is an amenable number.

31421342433 is a deficient number, since it is larger than the sum of its proper divisors (13696482655).

31421342433 is a wasteful number, since it uses less digits than its factorization.

31421342433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805675463.

The product of its digits is 20736, while the sum is 30.

Adding to 31421342433 its reverse (33424312413), we get a palindrome (64845654846).

The spelling of 31421342433 in words is "thirty-one billion, four hundred twenty-one million, three hundred forty-two thousand, four hundred thirty-three".