1550021930 has 16 divisors (see below), whose sum is σ = 2849402880. Its totient is φ = 606816912.

The previous prime is 1550021923. The next prime is 1550021939. The reversal of 1550021930 is 391200551.

It is a self number, because there is not a number n which added to its sum of digits gives 1550021930.

It is not an unprimeable number, because it can be changed into a prime (1550021939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1648490 + ... + 1649429.

It is an arithmetic number, because the mean of its divisors is an integer number (178087680).

Almost surely, 2^1550021930 is an apocalyptic number.

1550021930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1550021930 is a deficient number, since it is larger than the sum of its proper divisors (1299380950).

1550021930 is a wasteful number, since it uses less digits than its factorization.

1550021930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297973.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 1550021930 is about 39370.3178803525. The cubic root of 1550021930 is about 1157.2999851875.

The spelling of 1550021930 in words is "one billion, five hundred fifty million, twenty-one thousand, nine hundred thirty".