31402021443 has 16 divisors (see below), whose sum is σ = 45164399616. Its totient is φ = 19292470560.

The previous prime is 31402021439. The next prime is 31402021447. The reversal of 31402021443 is 34412020413.

It is an interprime number because it is at equal distance from previous prime (31402021439) and next prime (31402021447).

It is not a de Polignac number, because 31402021443 - 2² = 31402021439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31402021447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 639573 + ... + 686918.

It is an arithmetic number, because the mean of its divisors is an integer number (2822774976).

Almost surely, 2^31402021443 is an apocalyptic number.

31402021443 is a deficient number, since it is larger than the sum of its proper divisors (13762378173).

31402021443 is a wasteful number, since it uses less digits than its factorization.

31402021443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327114.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 31402021443 its reverse (34412020413), we get a palindrome (65814041856).

The spelling of 31402021443 in words is "thirty-one billion, four hundred two million, twenty-one thousand, four hundred forty-three".