50021000 has 32 divisors (see below), whose sum is σ = 117051480. Its totient is φ = 20008000.

The previous prime is 50020981. The next prime is 50021033. The reversal of 50021000 is 12005.

It can be written as a sum of positive squares in 4 ways, for example, as 19307236 + 30713764 = 4394^2 + 5542^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24011 + ... + 26010.

Almost surely, 2^50021000 is an apocalyptic number.

50021000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

50021000 is an abundant number, since it is smaller than the sum of its proper divisors (67030480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

50021000 is a wasteful number, since it uses less digits than its factorization.

50021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50042 (or 50028 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 50021000 is about 7072.5525802217. The cubic root of 50021000 is about 368.4547190860.

Adding to 50021000 its reverse (12005), we get a palindrome (50033005).

The spelling of 50021000 in words is "fifty million, twenty-one thousand".