131583421 has 2 divisors, whose sum is σ = 131583422. Its totient is φ = 131583420.

The previous prime is 131583373. The next prime is 131583443. The reversal of 131583421 is 124385131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93896100 + 37687321 = 9690^2 + 6139^2 .

It is a cyclic number.

It is not a de Polignac number, because 131583421 - 2⁷ = 131583293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131583421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131583521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65791710 + 65791711.

It is an arithmetic number, because the mean of its divisors is an integer number (65791711).

Almost surely, 2^131583421 is an apocalyptic number.

It is an amenable number.

131583421 is a deficient number, since it is larger than the sum of its proper divisors (1).

131583421 is an equidigital number, since it uses as much as digits as its factorization.

131583421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 28.

The square root of 131583421 is about 11470.9816929503. The cubic root of 131583421 is about 508.6281483494.

The spelling of 131583421 in words is "one hundred thirty-one million, five hundred eighty-three thousand, four hundred twenty-one".