245315131 has 2 divisors, whose sum is σ = 245315132. Its totient is φ = 245315130.

The previous prime is 245315107. The next prime is 245315149. The reversal of 245315131 is 131513542.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245315131 - 2⁷ = 245315003 is a prime.

It is a super-2 number, since 2×245315131² = 120359026995094322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 245315096 and 245315105.

It is not a weakly prime, because it can be changed into another prime (245319131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122657565 + 122657566.

It is an arithmetic number, because the mean of its divisors is an integer number (122657566).

Almost surely, 2^245315131 is an apocalyptic number.

245315131 is a deficient number, since it is larger than the sum of its proper divisors (1).

245315131 is an equidigital number, since it uses as much as digits as its factorization.

245315131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 245315131 is about 15662.5390981156. The cubic root of 245315131 is about 626.0006422093. Note that the first 3 decimals are identical.

Adding to 245315131 its reverse (131513542), we get a palindrome (376828673).

The spelling of 245315131 in words is "two hundred forty-five million, three hundred fifteen thousand, one hundred thirty-one".