145451355281 has 2 divisors, whose sum is σ = 145451355282. Its totient is φ = 145451355280.

The previous prime is 145451355191. The next prime is 145451355347. The reversal of 145451355281 is 182553154541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143914009600 + 1537345681 = 379360^2 + 39209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145451355281 is a prime.

It is a super-2 number, since 2×145451355281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145451351281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72725677640 + 72725677641.

It is an arithmetic number, because the mean of its divisors is an integer number (72725677641).

Almost surely, 2^145451355281 is an apocalyptic number.

It is an amenable number.

145451355281 is a deficient number, since it is larger than the sum of its proper divisors (1).

145451355281 is an equidigital number, since it uses as much as digits as its factorization.

145451355281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480000, while the sum is 44.

The spelling of 145451355281 in words is "one hundred forty-five billion, four hundred fifty-one million, three hundred fifty-five thousand, two hundred eighty-one".