21231050 has 24 divisors (see below), whose sum is σ = 40142892. Its totient is φ = 8352000.

The previous prime is 21231029. The next prime is 21231107. The reversal of 21231050 is 5013212.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4739329 + 16491721 = 2177^2 + 4061^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 431 + ... + 6530.

Almost surely, 2^21231050 is an apocalyptic number.

21231050 is a deficient number, since it is larger than the sum of its proper divisors (18911842).

21231050 is a wasteful number, since it uses less digits than its factorization.

21231050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034 (or 7029 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 21231050 is about 4607.7163541173. The cubic root of 21231050 is about 276.9005538226.

Adding to 21231050 its reverse (5013212), we get a palindrome (26244262).

The spelling of 21231050 in words is "twenty-one million, two hundred thirty-one thousand, fifty".