1813125530 has 32 divisors (see below), whose sum is σ = 3454704000. Its totient is φ = 683952192.

The previous prime is 1813125529. The next prime is 1813125539. The reversal of 1813125530 is 355213181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 1813125493 and 1813125502.

It is not an unprimeable number, because it can be changed into a prime (1813125539) 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 in 15 ways as a sum of consecutive naturals, for example, 60230 + ... + 85169.

It is an arithmetic number, because the mean of its divisors is an integer number (107959500).

Almost surely, 2^1813125530 is an apocalyptic number.

1813125530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1813125530 is a deficient number, since it is larger than the sum of its proper divisors (1641578470).

1813125530 is a wasteful number, since it uses less digits than its factorization.

1813125530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145478.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1813125530 is about 42580.8117583496. The cubic root of 1813125530 is about 1219.3899866257.

The spelling of 1813125530 in words is "one billion, eight hundred thirteen million, one hundred twenty-five thousand, five hundred thirty".