31020130291 has 4 divisors (see below), whose sum is σ = 32368831632. Its totient is φ = 29671428952.

The previous prime is 31020130289. The next prime is 31020130313. The reversal of 31020130291 is 19203102013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19203102013 = 1607 ⋅11949659.

It is a cyclic number.

It is not a de Polignac number, because 31020130291 - 2¹ = 31020130289 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (31020130201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 674350636 + ... + 674350681.

It is an arithmetic number, because the mean of its divisors is an integer number (8092207908).

Almost surely, 2^31020130291 is an apocalyptic number.

31020130291 is a deficient number, since it is larger than the sum of its proper divisors (1348701341).

31020130291 is a wasteful number, since it uses less digits than its factorization.

31020130291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348701340.

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 31020130291 in words is "thirty-one billion, twenty million, one hundred thirty thousand, two hundred ninety-one".