1225310018 has 4 divisors (see below), whose sum is σ = 1837965030. Its totient is φ = 612655008.

The previous prime is 1225310017. The next prime is 1225310029. The reversal of 1225310018 is 8100135221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1223110729 + 2199289 = 34973^2 + 1483^2 .

It is a super-2 number, since 2×1225310018² = 3002769280422320648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1225309975 and 1225310002.

It is not an unprimeable number, because it can be changed into a prime (1225310017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306327503 + ... + 306327506.

Almost surely, 2^1225310018 is an apocalyptic number.

1225310018 is a deficient number, since it is larger than the sum of its proper divisors (612655012).

1225310018 is an equidigital number, since it uses as much as digits as its factorization.

1225310018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612655011.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1225310018 is about 35004.4285483994. The cubic root of 1225310018 is about 1070.0777356398.

Adding to 1225310018 its reverse (8100135221), we get a palindrome (9325445239).

The spelling of 1225310018 in words is "one billion, two hundred twenty-five million, three hundred ten thousand, eighteen".