31145021530342 has 16 divisors (see below), whose sum is σ = 48350462164992. Its totient is φ = 15030823989960.

The previous prime is 31145021530307. The next prime is 31145021530349. The reversal of 31145021530342 is 24303512054113.

It is a super-2 number, since 2×31145021530342² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31145021530298 and 31145021530307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145021530349) 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 7 ways as a sum of consecutive naturals, for example, 655771368 + ... + 655818859.

It is an arithmetic number, because the mean of its divisors is an integer number (3021903885312).

Almost surely, 2^{31145021530342} is an apocalyptic number.

31145021530342 is a deficient number, since it is larger than the sum of its proper divisors (17205440634650).

31145021530342 is a wasteful number, since it uses less digits than its factorization.

31145021530342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311590643.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 31145021530342 its reverse (24303512054113), we get a palindrome (55448533584455).

The spelling of 31145021530342 in words is "thirty-one trillion, one hundred forty-five billion, twenty-one million, five hundred thirty thousand, three hundred forty-two".