250000531243021 has 8 divisors (see below), whose sum is σ = 269232226515000. Its totient is φ = 230768962424832.

The previous prime is 250000531243009. The next prime is 250000531243081. The reversal of 250000531243021 is 120342135000052.

It can be written as a sum of positive squares in 4 ways, for example, as 94628419665796 + 155372111577225 = 9727714^2 + 12464835^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 250000531243021 - 2¹¹ = 250000531240973 is a prime.

It is a super-2 number, since 2×250000531243021² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250000531243081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27487396 + ... + 35433853.

It is an arithmetic number, because the mean of its divisors is an integer number (33654028314375).

Almost surely, 2^{250000531243021} is an apocalyptic number.

It is an amenable number.

250000531243021 is a deficient number, since it is larger than the sum of its proper divisors (19231695271979).

250000531243021 is a wasteful number, since it uses less digits than its factorization.

250000531243021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63226895.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 250000531243021 its reverse (120342135000052), we get a palindrome (370342666243073).

The spelling of 250000531243021 in words is "two hundred fifty trillion, five hundred thirty-one million, two hundred forty-three thousand, twenty-one".