31243130133 has 8 divisors (see below), whose sum is σ = 41777558688. Its totient is φ = 20768727504.

The previous prime is 31243130123. The next prime is 31243130137. The reversal of 31243130133 is 33103134213.

It is a happy number.

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

It is not a de Polignac number, because 31243130133 - 2¹⁰ = 31243129109 is a prime.

It is a super-2 number, since 2×31243130133² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31243130137) 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 7 ways as a sum of consecutive naturals, for example, 15005266 + ... + 15007347.

It is an arithmetic number, because the mean of its divisors is an integer number (5222194836).

Almost surely, 2^31243130133 is an apocalyptic number.

It is an amenable number.

31243130133 is a deficient number, since it is larger than the sum of its proper divisors (10534428555).

31243130133 is a wasteful number, since it uses less digits than its factorization.

31243130133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30012963.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 31243130133 its reverse (33103134213), we get a palindrome (64346264346).

The spelling of 31243130133 in words is "thirty-one billion, two hundred forty-three million, one hundred thirty thousand, one hundred thirty-three".