50921000 has 64 divisors (see below), whose sum is σ = 128353680. Its totient is φ = 18796800.

The previous prime is 50920949. The next prime is 50921021. The reversal of 50921000 is 12905.

It can be written as a sum of positive squares in 8 ways, for example, as 1162084 + 49758916 = 1078^2 + 7054^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 50921000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11042 + ... + 14958.

Almost surely, 2^50921000 is an apocalyptic number.

50921000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50921000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64176840).

50921000 is an abundant number, since it is smaller than the sum of its proper divisors (77432680).

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

50921000 is a wasteful number, since it uses less digits than its factorization.

50921000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951 (or 3937 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 50921000 is about 7135.8951786023. The cubic root of 50921000 is about 370.6513969579.

Adding to 50921000 its reverse (12905), we get a palindrome (50933905).

The spelling of 50921000 in words is "fifty million, nine hundred twenty-one thousand".