454531151231981 has 2 divisors, whose sum is σ = 454531151231982. Its totient is φ = 454531151231980.

The previous prime is 454531151231959. The next prime is 454531151232013. The reversal of 454531151231981 is 189132151135454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 383851988963881 + 70679162268100 = 19592141^2 + 8407090^2 .

It is a cyclic number.

It is not a de Polignac number, because 454531151231981 - 2¹⁴ = 454531151215597 is a prime.

It is a super-2 number, since 2×454531151231981² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (454531151231921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227265575615990 + 227265575615991.

It is an arithmetic number, because the mean of its divisors is an integer number (227265575615991).

Almost surely, 2^{454531151231981} is an apocalyptic number.

It is an amenable number.

454531151231981 is a deficient number, since it is larger than the sum of its proper divisors (1).

454531151231981 is an equidigital number, since it uses as much as digits as its factorization.

454531151231981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592000, while the sum is 53.

The spelling of 454531151231981 in words is "four hundred fifty-four trillion, five hundred thirty-one billion, one hundred fifty-one million, two hundred thirty-one thousand, nine hundred eighty-one".