31433054323421 has 4 divisors (see below), whose sum is σ = 31721430968700. Its totient is φ = 31144677678144.

The previous prime is 31433054323369. The next prime is 31433054323481. The reversal of 31433054323421 is 12432345033413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27577348999396 + 3855705324025 = 5251414^2 + 1963595^2 .

It is a cyclic number.

It is not a de Polignac number, because 31433054323421 - 2²⁶ = 31432987214557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31433054323481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144188322476 + ... + 144188322693.

It is an arithmetic number, because the mean of its divisors is an integer number (7930357742175).

Almost surely, 2^{31433054323421} is an apocalyptic number.

It is an amenable number.

31433054323421 is a deficient number, since it is larger than the sum of its proper divisors (288376645279).

31433054323421 is a wasteful number, since it uses less digits than its factorization.

31433054323421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288376645278.

The product of its (nonzero) digits is 311040, while the sum is 38.

Adding to 31433054323421 its reverse (12432345033413), we get a palindrome (43865399356834).

The spelling of 31433054323421 in words is "thirty-one trillion, four hundred thirty-three billion, fifty-four million, three hundred twenty-three thousand, four hundred twenty-one".