252033131981 has 2 divisors, whose sum is σ = 252033131982. Its totient is φ = 252033131980.

The previous prime is 252033131971. The next prime is 252033131993. The reversal of 252033131981 is 189131330252.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243685386025 + 8347745956 = 493645^2 + 91366^2 .

It is a cyclic number.

It is not a de Polignac number, because 252033131981 - 2¹⁴ = 252033115597 is a prime.

It is a super-2 number, since 2×252033131981² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252033131921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126016565990 + 126016565991.

It is an arithmetic number, because the mean of its divisors is an integer number (126016565991).

Almost surely, 2^252033131981 is an apocalyptic number.

It is an amenable number.

252033131981 is a deficient number, since it is larger than the sum of its proper divisors (1).

252033131981 is an equidigital number, since it uses as much as digits as its factorization.

252033131981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 252033131981 in words is "two hundred fifty-two billion, thirty-three million, one hundred thirty-one thousand, nine hundred eighty-one".