31430644220142 has 24 divisors (see below), whose sum is σ = 68736175214616. Its totient is φ = 10378966626576.

The previous prime is 31430644220111. The next prime is 31430644220191. The reversal of 31430644220142 is 24102244603413.

31430644220142 is a `hidden beast` number, since 3 + 1 + 4 + 3 + 0 + 6 + 442 + 201 + 4 + 2 = 666.

It is a super-2 number, since 2×31430644220142² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31430644220097 and 31430644220106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8159563033 + ... + 8159566884.

It is an arithmetic number, because the mean of its divisors is an integer number (2864007300609).

Almost surely, 2^{31430644220142} is an apocalyptic number.

31430644220142 is an abundant number, since it is smaller than the sum of its proper divisors (37305530994474).

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

31430644220142 is a wasteful number, since it uses less digits than its factorization.

31430644220142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16319130032 (or 16319130029 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

Adding to 31430644220142 its reverse (24102244603413), we get a palindrome (55532888823555).

The spelling of 31430644220142 in words is "thirty-one trillion, four hundred thirty billion, six hundred forty-four million, two hundred twenty thousand, one hundred forty-two".