131030100 has 54 divisors (see below), whose sum is σ = 410709390. Its totient is φ = 34941120.

The previous prime is 131030093. The next prime is 131030129. The reversal of 131030100 is 1030131.

It can be written as a sum of positive squares in 3 ways, for example, as 248004 + 130782096 = 498^2 + 11436^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 71895 + ... + 73694.

Almost surely, 2^131030100 is an apocalyptic number.

131030100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131030100 is an abundant number, since it is smaller than the sum of its proper divisors (279679290).

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

131030100 is a wasteful number, since it uses less digits than its factorization.

131030100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145609 (or 145599 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 9.

The square root of 131030100 is about 11446.8379913407. The cubic root of 131030100 is about 507.9142031722.

Adding to 131030100 its reverse (1030131), we get a palindrome (132060231).

The spelling of 131030100 in words is "one hundred thirty-one million, thirty thousand, one hundred".