318225629 has 4 divisors (see below), whose sum is σ = 318361884. Its totient is φ = 318089376.

The previous prime is 318225619. The next prime is 318225643. The reversal of 318225629 is 926522813.

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

It can be written as a sum of positive squares in 2 ways, for example, as 161925625 + 156300004 = 12725^2 + 12502^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318225629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 318225592 and 318225601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318225619) 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, 64562 + ... + 69315.

It is an arithmetic number, because the mean of its divisors is an integer number (79590471).

Almost surely, 2^318225629 is an apocalyptic number.

It is an amenable number.

318225629 is a deficient number, since it is larger than the sum of its proper divisors (136255).

318225629 is a wasteful number, since it uses less digits than its factorization.

318225629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136254.

The product of its digits is 51840, while the sum is 38.

The square root of 318225629 is about 17838.8797013714. The cubic root of 318225629 is about 682.7238132268.

The spelling of 318225629 in words is "three hundred eighteen million, two hundred twenty-five thousand, six hundred twenty-nine".