45399281 has 2 divisors, whose sum is σ = 45399282. Its totient is φ = 45399280.

The previous prime is 45399269. The next prime is 45399287. The reversal of 45399281 is 18299354.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31080625 + 14318656 = 5575^2 + 3784^2 .

It is a cyclic number.

It is not a de Polignac number, because 45399281 - 2¹⁰ = 45398257 is a prime.

It is a super-2 number, since 2×45399281² = 4122189430633922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45399287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22699640 + 22699641.

It is an arithmetic number, because the mean of its divisors is an integer number (22699641).

Almost surely, 2^45399281 is an apocalyptic number.

It is an amenable number.

45399281 is a deficient number, since it is larger than the sum of its proper divisors (1).

45399281 is an equidigital number, since it uses as much as digits as its factorization.

45399281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 45399281 is about 6737.8988564685. The cubic root of 45399281 is about 356.7382341998.

The spelling of 45399281 in words is "forty-five million, three hundred ninety-nine thousand, two hundred eighty-one".