31354342505 has 8 divisors (see below), whose sum is σ = 37661085000. Its totient is φ = 25059558016.

The previous prime is 31354342477. The next prime is 31354342519. The reversal of 31354342505 is 50524345313.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12490968169 + 18863374336 = 111763^2 + 137344^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31354342505 - 2²⁰ = 31353293929 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2983730 + ... + 2994219.

It is an arithmetic number, because the mean of its divisors is an integer number (4707635625).

Almost surely, 2^31354342505 is an apocalyptic number.

It is an amenable number.

31354342505 is a deficient number, since it is larger than the sum of its proper divisors (6306742495).

31354342505 is a wasteful number, since it uses less digits than its factorization.

31354342505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5979003.

The product of its (nonzero) digits is 108000, while the sum is 35.

Adding to 31354342505 its reverse (50524345313), we get a palindrome (81878687818).

The spelling of 31354342505 in words is "thirty-one billion, three hundred fifty-four million, three hundred forty-two thousand, five hundred five".