1021550135 has 4 divisors (see below), whose sum is σ = 1225860168. Its totient is φ = 817240104.

The previous prime is 1021550119. The next prime is 1021550141. The reversal of 1021550135 is 5310551201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1021550135 - 2⁴ = 1021550119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021550135.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 102155009 + ... + 102155018.

It is an arithmetic number, because the mean of its divisors is an integer number (306465042).

Almost surely, 2^1021550135 is an apocalyptic number.

1021550135 is a deficient number, since it is larger than the sum of its proper divisors (204310033).

1021550135 is an equidigital number, since it uses as much as digits as its factorization.

1021550135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204310032.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1021550135 is about 31961.6979367492. The cubic root of 1021550135 is about 1007.1323864531.

The spelling of 1021550135 in words is "one billion, twenty-one million, five hundred fifty thousand, one hundred thirty-five".