245204431 has 2 divisors, whose sum is σ = 245204432. Its totient is φ = 245204430.

The previous prime is 245204429. The next prime is 245204441. The reversal of 245204431 is 134402542.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245204431 - 2¹ = 245204429 is a prime.

It is a super-2 number, since 2×245204431² = 120250425964067522, which contains 22 as substring.

Together with 245204429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 245204396 and 245204405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245204441) 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 as a sum of consecutive naturals, namely, 122602215 + 122602216.

It is an arithmetic number, because the mean of its divisors is an integer number (122602216).

Almost surely, 2^245204431 is an apocalyptic number.

245204431 is a deficient number, since it is larger than the sum of its proper divisors (1).

245204431 is an equidigital number, since it uses as much as digits as its factorization.

245204431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 245204431 is about 15659.0047895771. The cubic root of 245204431 is about 625.9064657960.

Adding to 245204431 its reverse (134402542), we get a palindrome (379606973).

The spelling of 245204431 in words is "two hundred forty-five million, two hundred four thousand, four hundred thirty-one".