245320431 has 4 divisors (see below), whose sum is σ = 327093912. Its totient is φ = 163546952.

The previous prime is 245320423. The next prime is 245320451. The reversal of 245320431 is 134023542.

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 245320431 - 2³ = 245320423 is a prime.

It is a super-2 number, since 2×245320431² = 120364227732051522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245320451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40886736 + ... + 40886741.

It is an arithmetic number, because the mean of its divisors is an integer number (81773478).

Almost surely, 2^245320431 is an apocalyptic number.

245320431 is a deficient number, since it is larger than the sum of its proper divisors (81773481).

245320431 is an equidigital number, since it uses as much as digits as its factorization.

245320431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81773480.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 245320431 is about 15662.7082907140. The cubic root of 245320431 is about 626.0051503964.

Adding to 245320431 its reverse (134023542), we get a palindrome (379343973).

The spelling of 245320431 in words is "two hundred forty-five million, three hundred twenty thousand, four hundred thirty-one".