31033434021 has 8 divisors (see below), whose sum is σ = 41390354880. Its totient is φ = 20682734592.

The previous prime is 31033434007. The next prime is 31033434037. The reversal of 31033434021 is 12043433013.

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

It is not a de Polignac number, because 31033434021 - 2⁶ = 31033433957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31033433982 and 31033434000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31033434071) 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, 1543705 + ... + 1563678.

It is an arithmetic number, because the mean of its divisors is an integer number (5173794360).

Almost surely, 2^31033434021 is an apocalyptic number.

It is an amenable number.

31033434021 is a deficient number, since it is larger than the sum of its proper divisors (10356920859).

31033434021 is a wasteful number, since it uses less digits than its factorization.

31033434021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3110715.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31033434021 its reverse (12043433013), we get a palindrome (43076867034).

The spelling of 31033434021 in words is "thirty-one billion, thirty-three million, four hundred thirty-four thousand, twenty-one".