31143042125 has 64 divisors (see below), whose sum is σ = 42585274368. Its totient is φ = 22600512000.

The previous prime is 31143042121. The next prime is 31143042143. The reversal of 31143042125 is 52124034113.

It is a happy number.

It is not a de Polignac number, because 31143042125 - 2² = 31143042121 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31143042094 and 31143042103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143042121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31425380 + ... + 31426370.

It is an arithmetic number, because the mean of its divisors is an integer number (665394912).

Almost surely, 2^31143042125 is an apocalyptic number.

It is an amenable number.

31143042125 is a deficient number, since it is larger than the sum of its proper divisors (11442232243).

31143042125 is a wasteful number, since it uses less digits than its factorization.

31143042125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335 (or 1325 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 31143042125 its reverse (52124034113), we get a palindrome (83267076238).

The spelling of 31143042125 in words is "thirty-one billion, one hundred forty-three million, forty-two thousand, one hundred twenty-five".