131301251 has 4 divisors (see below), whose sum is σ = 139024872. Its totient is φ = 123577632.

The previous prime is 131301199. The next prime is 131301259. The reversal of 131301251 is 152103131.

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 131301251 - 2⁶ = 131301187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7723603 = 131301251 / (1 + 3 + 1 + 3 + 0 + 1 + 2 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131301259) 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, 3861785 + ... + 3861818.

It is an arithmetic number, because the mean of its divisors is an integer number (34756218).

Almost surely, 2^131301251 is an apocalyptic number.

131301251 is a deficient number, since it is larger than the sum of its proper divisors (7723621).

131301251 is an equidigital number, since it uses as much as digits as its factorization.

131301251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7723620.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 131301251 is about 11458.6757960944. The cubic root of 131301251 is about 508.2643175197.

Adding to 131301251 its reverse (152103131), we get a palindrome (283404382).

The spelling of 131301251 in words is "one hundred thirty-one million, three hundred one thousand, two hundred fifty-one".