31143103256 has 8 divisors (see below), whose sum is σ = 58393318620. Its totient is φ = 15571551624.

The previous prime is 31143103157. The next prime is 31143103259. The reversal of 31143103256 is 65230134113.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143103259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1946443946 + ... + 1946443961.

Almost surely, 2^31143103256 is an apocalyptic number.

It is an amenable number.

31143103256 is a deficient number, since it is larger than the sum of its proper divisors (27250215364).

31143103256 is a wasteful number, since it uses less digits than its factorization.

31143103256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3892887913 (or 3892887909 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 31143103256 its reverse (65230134113), we get a palindrome (96373237369).

The spelling of 31143103256 in words is "thirty-one billion, one hundred forty-three million, one hundred three thousand, two hundred fifty-six".