31540043342 has 16 divisors (see below), whose sum is σ = 47805660672. Its totient is φ = 15604876800.

The previous prime is 31540043317. The next prime is 31540043389. The reversal of 31540043342 is 24334004513.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1803842 + ... + 1821242.

It is an arithmetic number, because the mean of its divisors is an integer number (2987853792).

Almost surely, 2^31540043342 is an apocalyptic number.

31540043342 is a deficient number, since it is larger than the sum of its proper divisors (16265617330).

31540043342 is a wasteful number, since it uses less digits than its factorization.

31540043342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26843.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 31540043342 its reverse (24334004513), we get a palindrome (55874047855).

The spelling of 31540043342 in words is "thirty-one billion, five hundred forty million, forty-three thousand, three hundred forty-two".