31140244141 has 4 divisors (see below), whose sum is σ = 31140976284. Its totient is φ = 31139512000.

The previous prime is 31140244129. The next prime is 31140244147. The reversal of 31140244141 is 14144204113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8413475625 + 22726768516 = 91725^2 + 150754^2 .

It is a cyclic number.

It is not a de Polignac number, because 31140244141 - 2⁷ = 31140244013 is a prime.

It is a super-2 number, since 2×31140244141² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31140244147) 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, 298060 + ... + 388741.

It is an arithmetic number, because the mean of its divisors is an integer number (7785244071).

Almost surely, 2^31140244141 is an apocalyptic number.

It is an amenable number.

31140244141 is a deficient number, since it is larger than the sum of its proper divisors (732143).

31140244141 is an equidigital number, since it uses as much as digits as its factorization.

31140244141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732142.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 31140244141 its reverse (14144204113), we get a palindrome (45284448254).

The spelling of 31140244141 in words is "thirty-one billion, one hundred forty million, two hundred forty-four thousand, one hundred forty-one".