31530000156 has 48 divisors (see below), whose sum is σ = 77560191744. Its totient is φ = 9949395456.

The previous prime is 31530000121. The next prime is 31530000199. The reversal of 31530000156 is 65100003513.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 562090 + ... + 615633.

It is an arithmetic number, because the mean of its divisors is an integer number (1615837328).

Almost surely, 2^31530000156 is an apocalyptic number.

It is an amenable number.

31530000156 is an abundant number, since it is smaller than the sum of its proper divisors (46030191588).

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

31530000156 is a wasteful number, since it uses less digits than its factorization.

31530000156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177850 (or 1177848 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 24.

Adding to 31530000156 its reverse (65100003513), we get a palindrome (96630003669).

The spelling of 31530000156 in words is "thirty-one billion, five hundred thirty million, one hundred fifty-six", and thus it is an aban number.