1020431240533 has 2 divisors, whose sum is σ = 1020431240534. Its totient is φ = 1020431240532.

The previous prime is 1020431240531. The next prime is 1020431240537. The reversal of 1020431240533 is 3350421340201.

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., 833317031044 + 187114209489 = 912862^2 + 432567^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020431240533 - 2¹ = 1020431240531 is a prime.

Together with 1020431240531, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020431240531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510215620266 + 510215620267.

It is an arithmetic number, because the mean of its divisors is an integer number (510215620267).

Almost surely, 2^{1020431240533} is an apocalyptic number.

It is an amenable number.

1020431240533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020431240533 is an equidigital number, since it uses as much as digits as its factorization.

1020431240533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 1020431240533 its reverse (3350421340201), we get a palindrome (4370852580734).

The spelling of 1020431240533 in words is "one trillion, twenty billion, four hundred thirty-one million, two hundred forty thousand, five hundred thirty-three".