1621500050 has 12 divisors (see below), whose sum is σ = 3015990186. Its totient is φ = 648600000.

The previous prime is 1621500019. The next prime is 1621500091. The reversal of 1621500050 is 500051261.

It can be written as a sum of positive squares in 3 ways, for example, as 1312830289 + 308669761 = 36233^2 + 17569^2 .

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1621499995 and 1621500031.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16214951 + ... + 16215050.

Almost surely, 2^1621500050 is an apocalyptic number.

1621500050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1621500050 is a deficient number, since it is larger than the sum of its proper divisors (1394490136).

1621500050 is a wasteful number, since it uses less digits than its factorization.

1621500050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32430013 (or 32430008 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1621500050 is about 40267.8538042444. The cubic root of 1621500050 is about 1174.8226803493.

The spelling of 1621500050 in words is "one billion, six hundred twenty-one million, five hundred thousand, fifty".