131005223250 has 128 divisors (see below), whose sum is σ = 375490252800. Its totient is φ = 30087288000.

The previous prime is 131005223243. The next prime is 131005223281. The reversal of 131005223250 is 52322500131.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 131005223250.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 261130 + ... + 574629.

It is an arithmetic number, because the mean of its divisors is an integer number (2933517600).

Almost surely, 2^131005223250 is an apocalyptic number.

131005223250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131005223250 is an abundant number, since it is smaller than the sum of its proper divisors (244485029550).

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

131005223250 is a wasteful number, since it uses less digits than its factorization.

131005223250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835809 (or 835799 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 131005223250 its reverse (52322500131), we get a palindrome (183327723381).

The spelling of 131005223250 in words is "one hundred thirty-one billion, five million, two hundred twenty-three thousand, two hundred fifty".