245215451 has 6 divisors (see below), whose sum is σ = 265529340. Its totient is φ = 226352568.

The previous prime is 245215357. The next prime is 245215507. The reversal of 245215451 is 154512542.

It is not a de Polignac number, because 245215451 - 2¹⁸ = 244953307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245215051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 725321 + ... + 725658.

It is an arithmetic number, because the mean of its divisors is an integer number (44254890).

Almost surely, 2^245215451 is an apocalyptic number.

245215451 is a deficient number, since it is larger than the sum of its proper divisors (20313889).

245215451 is a wasteful number, since it uses less digits than its factorization.

245215451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451005 (or 1450992 counting only the distinct ones).

The product of its digits is 8000, while the sum is 29.

The square root of 245215451 is about 15659.3566598376. The cubic root of 245215451 is about 625.9158421708.

Adding to 245215451 its reverse (154512542), we get a palindrome (399727993).

The spelling of 245215451 in words is "two hundred forty-five million, two hundred fifteen thousand, four hundred fifty-one".