31023135525263 has 4 divisors (see below), whose sum is σ = 35455012028880. Its totient is φ = 26591259021648.

The previous prime is 31023135525259. The next prime is 31023135525307. The reversal of 31023135525263 is 36252553132013.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31023135525263 - 2² = 31023135525259 is a prime.

It is a super-2 number, since 2×31023135525263² (a number of 28 digits) contains 22 as substring.

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 31023135525263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023135525223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215938251798 + ... + 2215938251811.

It is an arithmetic number, because the mean of its divisors is an integer number (8863753007220).

Almost surely, 2^{31023135525263} is an apocalyptic number.

31023135525263 is a deficient number, since it is larger than the sum of its proper divisors (4431876503617).

31023135525263 is an equidigital number, since it uses as much as digits as its factorization.

31023135525263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431876503616.

The product of its (nonzero) digits is 486000, while the sum is 41.

Adding to 31023135525263 its reverse (36252553132013), we get a palindrome (67275688657276).

The spelling of 31023135525263 in words is "thirty-one trillion, twenty-three billion, one hundred thirty-five million, five hundred twenty-five thousand, two hundred sixty-three".