245225131 has 4 divisors (see below), whose sum is σ = 253681200. Its totient is φ = 236769064.

The previous prime is 245225107. The next prime is 245225147. The reversal of 245225131 is 131522542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131522542 = 2 ⋅65761271.

It is a cyclic number.

It is not a de Polignac number, because 245225131 - 2¹⁹ = 244700843 is a prime.

It is a super-2 number, since 2×245225131² = 120270729747934322, 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 = 245225096 and 245225105.

It is not an unprimeable number, because it can be changed into a prime (245223131) 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, 4227991 + ... + 4228048.

It is an arithmetic number, because the mean of its divisors is an integer number (63420300).

Almost surely, 2^245225131 is an apocalyptic number.

245225131 is a deficient number, since it is larger than the sum of its proper divisors (8456069).

245225131 is an equidigital number, since it uses as much as digits as its factorization.

245225131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8456068.

The product of its digits is 2400, while the sum is 25.

The square root of 245225131 is about 15659.6657371733. The cubic root of 245225131 is about 625.9240781739.

Adding to 245225131 its reverse (131522542), we get a palindrome (376747673).

The spelling of 245225131 in words is "two hundred forty-five million, two hundred twenty-five thousand, one hundred thirty-one".