31012140433 has 4 divisors (see below), whose sum is σ = 31037624100. Its totient is φ = 30986656768.

The previous prime is 31012140403. The next prime is 31012140443. The reversal of 31012140433 is 33404121013.

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 11115063184 + 19897077249 = 105428^2 + 141057^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31012140433 is a prime.

It is a super-2 number, since 2×31012140433² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31012140403) 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, 12740008 + ... + 12742441.

It is an arithmetic number, because the mean of its divisors is an integer number (7759406025).

Almost surely, 2^31012140433 is an apocalyptic number.

It is an amenable number.

31012140433 is a deficient number, since it is larger than the sum of its proper divisors (25483667).

31012140433 is a wasteful number, since it uses less digits than its factorization.

31012140433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25483666.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31012140433 its reverse (33404121013), we get a palindrome (64416261446).

The spelling of 31012140433 in words is "thirty-one billion, twelve million, one hundred forty thousand, four hundred thirty-three".