1022553491 has 2 divisors, whose sum is σ = 1022553492. Its totient is φ = 1022553490.

The previous prime is 1022553487. The next prime is 1022553517. The reversal of 1022553491 is 1943552201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1022553491 - 2² = 1022553487 is a prime.

It is not a weakly prime, because it can be changed into another prime (1022553691) 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, 511276745 + 511276746.

It is an arithmetic number, because the mean of its divisors is an integer number (511276746).

Almost surely, 2^1022553491 is an apocalyptic number.

1022553491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022553491 is an equidigital number, since it uses as much as digits as its factorization.

1022553491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1022553491 is about 31977.3903094045. The cubic root of 1022553491 is about 1007.4620102377.

The spelling of 1022553491 in words is "one billion, twenty-two million, five hundred fifty-three thousand, four hundred ninety-one".