31523055497 has 4 divisors (see below), whose sum is σ = 31525502100. Its totient is φ = 31520608896.

The previous prime is 31523055491. The next prime is 31523055503. The reversal of 31523055497 is 79455032513.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (31523055491) and next prime (31523055503).

It can be written as a sum of positive squares in 2 ways, for example, as 20463588601 + 11059466896 = 143051^2 + 105164^2 .

It is a cyclic number.

It is not a de Polignac number, because 31523055497 - 2⁴ = 31523055481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31523055491) 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, 1203872 + ... + 1229777.

It is an arithmetic number, because the mean of its divisors is an integer number (7881375525).

Almost surely, 2^31523055497 is an apocalyptic number.

It is an amenable number.

31523055497 is a deficient number, since it is larger than the sum of its proper divisors (2446603).

31523055497 is a wasteful number, since it uses less digits than its factorization.

31523055497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446602.

The product of its (nonzero) digits is 567000, while the sum is 44.

The spelling of 31523055497 in words is "thirty-one billion, five hundred twenty-three million, fifty-five thousand, four hundred ninety-seven".