31540201506 has 24 divisors (see below), whose sum is σ = 74549567664. Its totient is φ = 9557636760.

The previous prime is 31540201501. The next prime is 31540201531. The reversal of 31540201506 is 60510204513.

31540201506 is a `hidden beast` number, since 3 + 154 + 0 + 2 + 0 + 1 + 506 = 666.

It is a super-2 number, since 2×31540201506² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31540201506.

It is not an unprimeable number, because it can be changed into a prime (31540201501) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 79646776 + ... + 79647171.

It is an arithmetic number, because the mean of its divisors is an integer number (3106231986).

Almost surely, 2^31540201506 is an apocalyptic number.

31540201506 is an abundant number, since it is smaller than the sum of its proper divisors (43009366158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31540201506 is a wasteful number, since it uses less digits than its factorization.

31540201506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159293966 (or 159293963 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 31540201506 in words is "thirty-one billion, five hundred forty million, two hundred one thousand, five hundred six".