245642351 has 4 divisors (see below), whose sum is σ = 250868832. Its totient is φ = 240415872.

The previous prime is 245642281. The next prime is 245642377. The reversal of 245642351 is 153246542.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 245642351 - 2²² = 241448047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245642381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2613170 + ... + 2613263.

It is an arithmetic number, because the mean of its divisors is an integer number (62717208).

Almost surely, 2^245642351 is an apocalyptic number.

245642351 is a deficient number, since it is larger than the sum of its proper divisors (5226481).

245642351 is an equidigital number, since it uses as much as digits as its factorization.

245642351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5226480.

The product of its digits is 28800, while the sum is 32.

The square root of 245642351 is about 15672.9815606348. The cubic root of 245642351 is about 626.2788543192.

Adding to 245642351 its reverse (153246542), we get a palindrome (398888893).

The spelling of 245642351 in words is "two hundred forty-five million, six hundred forty-two thousand, three hundred fifty-one".