31301142231 has 4 divisors (see below), whose sum is σ = 41734856312. Its totient is φ = 20867428152.

The previous prime is 31301142193. The next prime is 31301142251. The reversal of 31301142231 is 13224110313.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31301142231 - 2¹⁸ = 31300880087 is a prime.

It is a super-2 number, since 2×31301142231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31301142198 and 31301142207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301142251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5216857036 + ... + 5216857041.

It is an arithmetic number, because the mean of its divisors is an integer number (10433714078).

Almost surely, 2^31301142231 is an apocalyptic number.

31301142231 is a deficient number, since it is larger than the sum of its proper divisors (10433714081).

31301142231 is a wasteful number, since it uses less digits than its factorization.

31301142231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10433714080.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31301142231 its reverse (13224110313), we get a palindrome (44525252544).

The spelling of 31301142231 in words is "thirty-one billion, three hundred one million, one hundred forty-two thousand, two hundred thirty-one".