31442130231 has 4 divisors (see below), whose sum is σ = 41922840312. Its totient is φ = 20961420152.

The previous prime is 31442130163. The next prime is 31442130263. The reversal of 31442130231 is 13203124413.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13203124413 = 3 ⋅4401041471.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31442130231 is a prime.

It is a super-2 number, since 2×31442130231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442130131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5240355036 + ... + 5240355041.

It is an arithmetic number, because the mean of its divisors is an integer number (10480710078).

Almost surely, 2^31442130231 is an apocalyptic number.

31442130231 is a deficient number, since it is larger than the sum of its proper divisors (10480710081).

31442130231 is a wasteful number, since it uses less digits than its factorization.

31442130231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10480710080.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31442130231 its reverse (13203124413), we get a palindrome (44645254644).

The spelling of 31442130231 in words is "thirty-one billion, four hundred forty-two million, one hundred thirty thousand, two hundred thirty-one".