1621211050 has 12 divisors (see below), whose sum is σ = 3015452646. Its totient is φ = 648484400.

The previous prime is 1621211023. The next prime is 1621211057. The reversal of 1621211050 is 501121261.

It can be written as a sum of positive squares in 3 ways, for example, as 1467426249 + 153784801 = 38307^2 + 12401^2 .

It is not an unprimeable number, because it can be changed into a prime (1621211057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16212061 + ... + 16212160.

Almost surely, 2^1621211050 is an apocalyptic number.

1621211050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1621211050 is a deficient number, since it is larger than the sum of its proper divisors (1394241596).

1621211050 is a wasteful number, since it uses less digits than its factorization.

1621211050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32424233 (or 32424228 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1621211050 is about 40264.2651739728. The cubic root of 1621211050 is about 1174.7528799757.

The spelling of 1621211050 in words is "one billion, six hundred twenty-one million, two hundred eleven thousand, fifty".