1821825106 has 4 divisors (see below), whose sum is σ = 2732737662. Its totient is φ = 910912552.

The previous prime is 1821825097. The next prime is 1821825151. The reversal of 1821825106 is 6015281281.

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., 1295352081 + 526473025 = 35991^2 + 22945^2 .

It is a super-2 number, since 2×1821825106² = 6638093433703822472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455456275 + ... + 455456278.

Almost surely, 2^1821825106 is an apocalyptic number.

1821825106 is a deficient number, since it is larger than the sum of its proper divisors (910912556).

1821825106 is an equidigital number, since it uses as much as digits as its factorization.

1821825106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910912555.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 1821825106 is about 42682.8432276951. The cubic root of 1821825106 is about 1221.3371315550.

The spelling of 1821825106 in words is "one billion, eight hundred twenty-one million, eight hundred twenty-five thousand, one hundred six".