245171131 has 4 divisors (see below), whose sum is σ = 245449672. Its totient is φ = 244892592.

The previous prime is 245171083. The next prime is 245171149. The reversal of 245171131 is 131171542.

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 245171131 - 2⁹ = 245170619 is a prime.

It is a super-2 number, since 2×245171131² = 120217766951638322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245171096 and 245171105.

It is not an unprimeable number, because it can be changed into a prime (245175131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137946 + ... + 139711.

It is an arithmetic number, because the mean of its divisors is an integer number (61362418).

Almost surely, 2^245171131 is an apocalyptic number.

245171131 is a deficient number, since it is larger than the sum of its proper divisors (278541).

245171131 is an equidigital number, since it uses as much as digits as its factorization.

245171131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278540.

The product of its digits is 840, while the sum is 25.

The square root of 245171131 is about 15657.9414675110. The cubic root of 245171131 is about 625.8781307604.

The spelling of 245171131 in words is "two hundred forty-five million, one hundred seventy-one thousand, one hundred thirty-one".