1051005551 has 2 divisors, whose sum is σ = 1051005552. Its totient is φ = 1051005550.

The previous prime is 1051005541. The next prime is 1051005583. The reversal of 1051005551 is 1555001501.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1051005551 - 2¹⁴ = 1050989167 is a prime.

It is a super-2 number, since 2×1051005551² = 2209225336465627202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1051005541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525502775 + 525502776.

It is an arithmetic number, because the mean of its divisors is an integer number (525502776).

Almost surely, 2^1051005551 is an apocalyptic number.

1051005551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051005551 is an equidigital number, since it uses as much as digits as its factorization.

1051005551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 625, while the sum is 23.

The square root of 1051005551 is about 32419.2157678128. The cubic root of 1051005551 is about 1016.7207099224.

The spelling of 1051005551 in words is "one billion, fifty-one million, five thousand, five hundred fifty-one".