1021550044 has 6 divisors (see below), whose sum is σ = 1787712584. Its totient is φ = 510775020.

The previous prime is 1021550039. The next prime is 1021550051. The reversal of 1021550044 is 4400551201.

It is a junction number, because it is equal to n+sod(n) for n = 1021549997 and 1021550024.

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 as a sum of consecutive naturals, namely, 127693752 + ... + 127693759.

Almost surely, 2^1021550044 is an apocalyptic number.

It is an amenable number.

1021550044 is a deficient number, since it is larger than the sum of its proper divisors (766162540).

1021550044 is a wasteful number, since it uses less digits than its factorization.

1021550044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255387515 (or 255387513 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1021550044 is about 31961.6965131703. The cubic root of 1021550044 is about 1007.1323565479.

The spelling of 1021550044 in words is "one billion, twenty-one million, five hundred fifty thousand, forty-four".