1620122431 has 2 divisors, whose sum is σ = 1620122432. Its totient is φ = 1620122430.

The previous prime is 1620122393. The next prime is 1620122443. The reversal of 1620122431 is 1342210261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1620122431 - 2¹³ = 1620114239 is a prime.

It is a super-2 number, since 2×1620122431² = 5249593382858699522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1620122531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810061215 + 810061216.

It is an arithmetic number, because the mean of its divisors is an integer number (810061216).

Almost surely, 2^1620122431 is an apocalyptic number.

1620122431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620122431 is an equidigital number, since it uses as much as digits as its factorization.

1620122431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1620122431 is about 40250.7444775870. The cubic root of 1620122431 is about 1174.4898780967.

Adding to 1620122431 its reverse (1342210261), we get a palindrome (2962332692).

The spelling of 1620122431 in words is "one billion, six hundred twenty million, one hundred twenty-two thousand, four hundred thirty-one".