245136431 has 2 divisors, whose sum is σ = 245136432. Its totient is φ = 245136430.

The previous prime is 245136427. The next prime is 245136473. The reversal of 245136431 is 134631542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245136431 - 2² = 245136427 is a prime.

It is a super-4 number, since 4×245136431⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 245136394 and 245136403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245136401) 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, 122568215 + 122568216.

It is an arithmetic number, because the mean of its divisors is an integer number (122568216).

Almost surely, 2^245136431 is an apocalyptic number.

245136431 is a deficient number, since it is larger than the sum of its proper divisors (1).

245136431 is an equidigital number, since it uses as much as digits as its factorization.

245136431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 29.

The square root of 245136431 is about 15656.8333643812. The cubic root of 245136431 is about 625.8486017320.

Adding to 245136431 its reverse (134631542), we get a palindrome (379767973).

The spelling of 245136431 in words is "two hundred forty-five million, one hundred thirty-six thousand, four hundred thirty-one".