31429509391 has 12 divisors (see below), whose sum is σ = 37180536840. Its totient is φ = 26482974000.

The previous prime is 31429509347. The next prime is 31429509403. The reversal of 31429509391 is 19390592413.

It is not a de Polignac number, because 31429509391 - 2¹³ = 31429501199 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 (31429509491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5432860 + ... + 5438641.

It is an arithmetic number, because the mean of its divisors is an integer number (3098378070).

Almost surely, 2^31429509391 is an apocalyptic number.

31429509391 is a deficient number, since it is larger than the sum of its proper divisors (5751027449).

31429509391 is a wasteful number, since it uses less digits than its factorization.

31429509391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10871574 (or 10871567 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 46.

The spelling of 31429509391 in words is "thirty-one billion, four hundred twenty-nine million, five hundred nine thousand, three hundred ninety-one".