1031022491 has 2 divisors, whose sum is σ = 1031022492. Its totient is φ = 1031022490.

The previous prime is 1031022469. The next prime is 1031022497. The reversal of 1031022491 is 1942201301.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1031022491 - 2²⁶ = 963913627 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1031022497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515511245 + 515511246.

It is an arithmetic number, because the mean of its divisors is an integer number (515511246).

Almost surely, 2^1031022491 is an apocalyptic number.

1031022491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031022491 is an equidigital number, since it uses as much as digits as its factorization.

1031022491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1031022491 is about 32109.5389409440. The cubic root of 1031022491 is about 1010.2357032488.

Adding to 1031022491 its reverse (1942201301), we get a palindrome (2973223792).

The spelling of 1031022491 in words is "one billion, thirty-one million, twenty-two thousand, four hundred ninety-one".