31150421597 has 4 divisors (see below), whose sum is σ = 32982799356. Its totient is φ = 29318043840.

The previous prime is 31150421591. The next prime is 31150421609. The reversal of 31150421597 is 79512405113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79512405113 = 19 ⋅4184863427.

It can be written as a sum of positive squares in 2 ways, for example, as 28527547801 + 2622873796 = 168901^2 + 51214^2 .

It is a cyclic number.

It is not a de Polignac number, because 31150421597 - 2⁴ = 31150421581 is a prime.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 31150421597.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31150421591) 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 3 ways as a sum of consecutive naturals, for example, 916188854 + ... + 916188887.

It is an arithmetic number, because the mean of its divisors is an integer number (8245699839).

Almost surely, 2^31150421597 is an apocalyptic number.

It is an amenable number.

31150421597 is a deficient number, since it is larger than the sum of its proper divisors (1832377759).

31150421597 is a wasteful number, since it uses less digits than its factorization.

31150421597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832377758.

The product of its (nonzero) digits is 37800, while the sum is 38.

The spelling of 31150421597 in words is "thirty-one billion, one hundred fifty million, four hundred twenty-one thousand, five hundred ninety-seven".