31340501 has 4 divisors (see below), whose sum is σ = 31352832. Its totient is φ = 31328172.

The previous prime is 31340471. The next prime is 31340509. The reversal of 31340501 is 10504313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10504313 = 2069 ⋅5077.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31340501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31340501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31340509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 791 + ... + 7956.

It is an arithmetic number, because the mean of its divisors is an integer number (7838208).

Almost surely, 2^31340501 is an apocalyptic number.

It is an amenable number.

31340501 is a deficient number, since it is larger than the sum of its proper divisors (12331).

31340501 is an equidigital number, since it uses as much as digits as its factorization.

31340501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12330.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 31340501 is about 5598.2587471463. The cubic root of 31340501 is about 315.2840337249.

Adding to 31340501 its reverse (10504313), we get a palindrome (41844814).

The spelling of 31340501 in words is "thirty-one million, three hundred forty thousand, five hundred one".