145561313 has 2 divisors, whose sum is σ = 145561314. Its totient is φ = 145561312.

The previous prime is 145561307. The next prime is 145561363. The reversal of 145561313 is 313165541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136025569 + 9535744 = 11663^2 + 3088^2 .

It is a cyclic number.

It is not a de Polignac number, because 145561313 - 2⁸ = 145561057 is a prime.

It is not a weakly prime, because it can be changed into another prime (145561363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72780656 + 72780657.

It is an arithmetic number, because the mean of its divisors is an integer number (72780657).

Almost surely, 2^145561313 is an apocalyptic number.

It is an amenable number.

145561313 is a deficient number, since it is larger than the sum of its proper divisors (1).

145561313 is an equidigital number, since it uses as much as digits as its factorization.

145561313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 29.

The square root of 145561313 is about 12064.8793197446. The cubic root of 145561313 is about 526.0358240623.

The spelling of 145561313 in words is "one hundred forty-five million, five hundred sixty-one thousand, three hundred thirteen".