31133240305 has 16 divisors (see below), whose sum is σ = 39337084800. Its totient is φ = 23589187200.

The previous prime is 31133240293. The next prime is 31133240351. The reversal of 31133240305 is 50304233113.

It is not a de Polignac number, because 31133240305 - 2¹³ = 31133232113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31133240305.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314580 + ... + 401530.

It is an arithmetic number, because the mean of its divisors is an integer number (2458567800).

Almost surely, 2^31133240305 is an apocalyptic number.

It is an amenable number.

31133240305 is a deficient number, since it is larger than the sum of its proper divisors (8203844495).

31133240305 is a wasteful number, since it uses less digits than its factorization.

31133240305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90744.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 31133240305 its reverse (50304233113), we get a palindrome (81437473418).

The spelling of 31133240305 in words is "thirty-one billion, one hundred thirty-three million, two hundred forty thousand, three hundred five".