31400235142 has 16 divisors (see below), whose sum is σ = 48179773440. Its totient is φ = 15344001288.

The previous prime is 31400235073. The next prime is 31400235179. The reversal of 31400235142 is 24153200413.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905542 + ... + 939577.

It is an arithmetic number, because the mean of its divisors is an integer number (3011235840).

Almost surely, 2^31400235142 is an apocalyptic number.

31400235142 is a deficient number, since it is larger than the sum of its proper divisors (16779538298).

31400235142 is a wasteful number, since it uses less digits than its factorization.

31400235142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845315.

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

Adding to 31400235142 its reverse (24153200413), we get a palindrome (55553435555).

The spelling of 31400235142 in words is "thirty-one billion, four hundred million, two hundred thirty-five thousand, one hundred forty-two".