431222137 has 2 divisors, whose sum is σ = 431222138. Its totient is φ = 431222136.

The previous prime is 431222131. The next prime is 431222149. The reversal of 431222137 is 731222134.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295289856 + 135932281 = 17184^2 + 11659^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431222137 is a prime.

It is not a weakly prime, because it can be changed into another prime (431222131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215611068 + 215611069.

It is an arithmetic number, because the mean of its divisors is an integer number (215611069).

Almost surely, 2^431222137 is an apocalyptic number.

It is an amenable number.

431222137 is a deficient number, since it is larger than the sum of its proper divisors (1).

431222137 is an equidigital number, since it uses as much as digits as its factorization.

431222137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 25.

The square root of 431222137 is about 20765.8887842539. Note that the first 3 decimals coincide. The cubic root of 431222137 is about 755.4986323521.

The spelling of 431222137 in words is "four hundred thirty-one million, two hundred twenty-two thousand, one hundred thirty-seven".