162031421 has 2 divisors, whose sum is σ = 162031422. Its totient is φ = 162031420.

The previous prime is 162031361. The next prime is 162031423. The reversal of 162031421 is 124130261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146071396 + 15960025 = 12086^2 + 3995^2 .

It is a cyclic number.

It is not a de Polignac number, because 162031421 - 2¹⁸ = 161769277 is a prime.

Together with 162031423, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 162031393 and 162031402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162031423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81015710 + 81015711.

It is an arithmetic number, because the mean of its divisors is an integer number (81015711).

Almost surely, 2^162031421 is an apocalyptic number.

It is an amenable number.

162031421 is a deficient number, since it is larger than the sum of its proper divisors (1).

162031421 is an equidigital number, since it uses as much as digits as its factorization.

162031421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 162031421 is about 12729.1563349658. The cubic root of 162031421 is about 545.1714198590.

Adding to 162031421 its reverse (124130261), we get a palindrome (286161682).

The spelling of 162031421 in words is "one hundred sixty-two million, thirty-one thousand, four hundred twenty-one".