31143030140441 has 4 divisors (see below), whose sum is σ = 31144462881972. Its totient is φ = 31141597398912.

The previous prime is 31143030140437. The next prime is 31143030140477. The reversal of 31143030140441 is 14404103034113.

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 5722123273216 + 25420906867225 = 2392096^2 + 5041915^2 .

It is a cyclic number.

It is not a de Polignac number, because 31143030140441 - 2² = 31143030140437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31143030140401) 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, 716338160 + ... + 716381633.

It is an arithmetic number, because the mean of its divisors is an integer number (7786115720493).

Almost surely, 2^{31143030140441} is an apocalyptic number.

It is an amenable number.

31143030140441 is a deficient number, since it is larger than the sum of its proper divisors (1432741531).

31143030140441 is a wasteful number, since it uses less digits than its factorization.

31143030140441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432741530.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 31143030140441 its reverse (14404103034113), we get a palindrome (45547133174554).

The spelling of 31143030140441 in words is "thirty-one trillion, one hundred forty-three billion, thirty million, one hundred forty thousand, four hundred forty-one".