1051332991 has 2 divisors, whose sum is σ = 1051332992. Its totient is φ = 1051332990.

The previous prime is 1051332959. The next prime is 1051333043. The reversal of 1051332991 is 1992331501.

It is a weak prime.

It is an emirp because it is prime and its reverse (1992331501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1051332991 - 2⁵ = 1051332959 is a prime.

It is a super-2 number, since 2×1051332991² = 2210602115930012162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1051332901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525666495 + 525666496.

It is an arithmetic number, because the mean of its divisors is an integer number (525666496).

Almost surely, 2^1051332991 is an apocalyptic number.

1051332991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051332991 is an equidigital number, since it uses as much as digits as its factorization.

1051332991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 1051332991 is about 32424.2654658513. The cubic root of 1051332991 is about 1016.8262851536.

The spelling of 1051332991 in words is "one billion, fifty-one million, three hundred thirty-two thousand, nine hundred ninety-one".