31421400433 has 4 divisors (see below), whose sum is σ = 31433409700. Its totient is φ = 31409391168.

The previous prime is 31421400401. The next prime is 31421400457. The reversal of 31421400433 is 33400412413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33400412413 = 37 ⋅902713849.

It can be written as a sum of positive squares in 2 ways, for example, as 29650084864 + 1771315569 = 172192^2 + 42087^2 .

It is a cyclic number.

It is not a de Polignac number, because 31421400433 - 2⁵ = 31421400401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31421400398 and 31421400407.

It is not an unprimeable number, because it can be changed into a prime (31421400463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6000708 + ... + 6005941.

It is an arithmetic number, because the mean of its divisors is an integer number (7858352425).

Almost surely, 2^31421400433 is an apocalyptic number.

It is an amenable number.

31421400433 is a deficient number, since it is larger than the sum of its proper divisors (12009267).

31421400433 is a wasteful number, since it uses less digits than its factorization.

31421400433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12009266.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31421400433 its reverse (33400412413), we get a palindrome (64821812846).

The spelling of 31421400433 in words is "thirty-one billion, four hundred twenty-one million, four hundred thousand, four hundred thirty-three".