31540203142 has 8 divisors (see below), whose sum is σ = 54068919696. Its totient is φ = 13517229912.

The previous prime is 31540203131. The next prime is 31540203187. The reversal of 31540203142 is 24130204513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1126435813 + ... + 1126435840.

It is an arithmetic number, because the mean of its divisors is an integer number (6758614962).

Almost surely, 2^31540203142 is an apocalyptic number.

31540203142 is a deficient number, since it is larger than the sum of its proper divisors (22528716554).

31540203142 is a wasteful number, since it uses less digits than its factorization.

31540203142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252871662.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 31540203142 its reverse (24130204513), we get a palindrome (55670407655).

The spelling of 31540203142 in words is "thirty-one billion, five hundred forty million, two hundred three thousand, one hundred forty-two".