131625322818 has 32 divisors (see below), whose sum is σ = 290025928512. Its totient is φ = 39491544000.

The previous prime is 131625322813. The next prime is 131625322823. The reversal of 131625322818 is 818223526131.

It is an interprime number because it is at equal distance from previous prime (131625322813) and next prime (131625322823).

It is a super-2 number, since 2×131625322818² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131625322818.

It is not an unprimeable number, because it can be changed into a prime (131625322813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9866221 + ... + 9879552.

It is an arithmetic number, because the mean of its divisors is an integer number (9063310266).

Almost surely, 2^131625322818 is an apocalyptic number.

131625322818 is an abundant number, since it is smaller than the sum of its proper divisors (158400605694).

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

131625322818 is a wasteful number, since it uses less digits than its factorization.

131625322818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19745890.

The product of its digits is 138240, while the sum is 42.

Adding to 131625322818 its reverse (818223526131), we get a palindrome (949848848949).

The spelling of 131625322818 in words is "one hundred thirty-one billion, six hundred twenty-five million, three hundred twenty-two thousand, eight hundred eighteen".