31530045155 has 48 divisors (see below), whose sum is σ = 44331053760. Its totient is φ = 21087842304.

The previous prime is 31530045149. The next prime is 31530045203. The reversal of 31530045155 is 55154003513.

It is not a de Polignac number, because 31530045155 - 2⁴ = 31530045139 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16690451 + ... + 16692339.

It is an arithmetic number, because the mean of its divisors is an integer number (923563620).

Almost surely, 2^31530045155 is an apocalyptic number.

31530045155 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

31530045155 is a deficient number, since it is larger than the sum of its proper divisors (12801008605).

31530045155 is a wasteful number, since it uses less digits than its factorization.

31530045155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156 (or 2097 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

Adding to 31530045155 its reverse (55154003513), we get a palindrome (86684048668).

The spelling of 31530045155 in words is "thirty-one billion, five hundred thirty million, forty-five thousand, one hundred fifty-five".