131847481 has 2 divisors, whose sum is σ = 131847482. Its totient is φ = 131847480.

The previous prime is 131847473. The next prime is 131847553. The reversal of 131847481 is 184748131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93605625 + 38241856 = 9675^2 + 6184^2 .

It is an emirp because it is prime and its reverse (184748131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131847481 - 2³ = 131847473 is a prime.

It is a super-2 number, since 2×131847481² = 34767516492090722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131847481.

It is not a weakly prime, because it can be changed into another prime (131847421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65923740 + 65923741.

It is an arithmetic number, because the mean of its divisors is an integer number (65923741).

Almost surely, 2^131847481 is an apocalyptic number.

It is an amenable number.

131847481 is a deficient number, since it is larger than the sum of its proper divisors (1).

131847481 is an equidigital number, since it uses as much as digits as its factorization.

131847481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 37.

The square root of 131847481 is about 11482.4858371347. The cubic root of 131847481 is about 508.9681572580.

The spelling of 131847481 in words is "one hundred thirty-one million, eight hundred forty-seven thousand, four hundred eighty-one".