31223030142 has 16 divisors (see below), whose sum is σ = 62773005312. Its totient is φ = 10353185880.

The previous prime is 31223030131. The next prime is 31223030171. The reversal of 31223030142 is 24103032213.

It is a super-2 number, since 2×31223030142² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 13621468 + ... + 13623759.

It is an arithmetic number, because the mean of its divisors is an integer number (3923312832).

Almost surely, 2^31223030142 is an apocalyptic number.

31223030142 is an abundant number, since it is smaller than the sum of its proper divisors (31549975170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31223030142 is a wasteful number, since it uses less digits than its factorization.

31223030142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27245423.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31223030142 its reverse (24103032213), we get a palindrome (55326062355).

The spelling of 31223030142 in words is "thirty-one billion, two hundred twenty-three million, thirty thousand, one hundred forty-two".