291031485497 has 16 divisors (see below), whose sum is σ = 296168234112. Its totient is φ = 285924656640.

The previous prime is 291031485469. The next prime is 291031485529. The reversal of 291031485497 is 794584130192.

It is not a de Polignac number, because 291031485497 - 2¹² = 291031481401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (291031485467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55997303 + ... + 56002499.

It is an arithmetic number, because the mean of its divisors is an integer number (18510514632).

Almost surely, 2^291031485497 is an apocalyptic number.

It is an amenable number.

291031485497 is a deficient number, since it is larger than the sum of its proper divisors (5136748615).

291031485497 is a wasteful number, since it uses less digits than its factorization.

291031485497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7888.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 291031485497 in words is "two hundred ninety-one billion, thirty-one million, four hundred eighty-five thousand, four hundred ninety-seven".