31540406163 has 32 divisors (see below), whose sum is σ = 50603827200. Its totient is φ = 17070219936.

The previous prime is 31540406147. The next prime is 31540406171. The reversal of 31540406163 is 36160404513.

It is not a de Polignac number, because 31540406163 - 2⁴ = 31540406147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31540406123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2194920 + ... + 2209242.

It is an arithmetic number, because the mean of its divisors is an integer number (1581369600).

Almost surely, 2^31540406163 is an apocalyptic number.

31540406163 is a deficient number, since it is larger than the sum of its proper divisors (19063421037).

31540406163 is a wasteful number, since it uses less digits than its factorization.

31540406163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19871.

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 31540406163 in words is "thirty-one billion, five hundred forty million, four hundred six thousand, one hundred sixty-three".