247245131 has 12 divisors (see below), whose sum is σ = 291081672. Its totient is φ = 209367648.

The previous prime is 247245121. The next prime is 247245149. The reversal of 247245131 is 131542742.

It is not a de Polignac number, because 247245131 - 2¹⁴ = 247228747 is a prime.

It is a super-2 number, since 2×247245131² = 122260309606414322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247245094 and 247245103.

It is not an unprimeable number, because it can be changed into a prime (247245121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26330 + ... + 34463.

It is an arithmetic number, because the mean of its divisors is an integer number (24256806).

Almost surely, 2^247245131 is an apocalyptic number.

247245131 is a deficient number, since it is larger than the sum of its proper divisors (43836541).

247245131 is an equidigital number, since it uses as much as digits as its factorization.

247245131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60890 (or 60883 counting only the distinct ones).

The product of its digits is 6720, while the sum is 29.

The square root of 247245131 is about 15724.0303675616. The cubic root of 247245131 is about 627.6380280799.

Adding to 247245131 its reverse (131542742), we get a palindrome (378787873).

The spelling of 247245131 in words is "two hundred forty-seven million, two hundred forty-five thousand, one hundred thirty-one".