31145021531269 has 2 divisors, whose sum is σ = 31145021531270. Its totient is φ = 31145021531268.

The previous prime is 31145021531251. The next prime is 31145021531293. The reversal of 31145021531269 is 96213512054113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29611424123044 + 1533597408225 = 5441638^2 + 1238385^2 .

It is a cyclic number.

It is not a de Polignac number, because 31145021531269 - 2³⁹ = 30595265717381 is a prime.

It is a super-2 number, since 2×31145021531269² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31145021531219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15572510765634 + 15572510765635.

It is an arithmetic number, because the mean of its divisors is an integer number (15572510765635).

Almost surely, 2^{31145021531269} is an apocalyptic number.

It is an amenable number.

31145021531269 is a deficient number, since it is larger than the sum of its proper divisors (1).

31145021531269 is an equidigital number, since it uses as much as digits as its factorization.

31145021531269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 31145021531269 in words is "thirty-one trillion, one hundred forty-five billion, twenty-one million, five hundred thirty-one thousand, two hundred sixty-nine".