131018807 has 4 divisors (see below), whose sum is σ = 134065800. Its totient is φ = 127971816.

The previous prime is 131018777. The next prime is 131018819. The reversal of 131018807 is 708810131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131018807 - 2⁶ = 131018743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131018807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131018827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1523432 + ... + 1523517.

It is an arithmetic number, because the mean of its divisors is an integer number (33516450).

Almost surely, 2^131018807 is an apocalyptic number.

131018807 is a deficient number, since it is larger than the sum of its proper divisors (3046993).

131018807 is an equidigital number, since it uses as much as digits as its factorization.

131018807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046992.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 131018807 is about 11446.3447003836. The cubic root of 131018807 is about 507.8996110037.

Adding to 131018807 its reverse (708810131), we get a palindrome (839828938).

The spelling of 131018807 in words is "one hundred thirty-one million, eighteen thousand, eight hundred seven".