1825220161 has 8 divisors (see below), whose sum is σ = 1923477920. Its totient is φ = 1727181792.

The previous prime is 1825220153. The next prime is 1825220171. The reversal of 1825220161 is 1610225281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1825220161 - 2³ = 1825220153 is a prime.

It is a super-2 number, since 2×1825220161² = 6662857272241731842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1825220171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37620 + ... + 71173.

It is an arithmetic number, because the mean of its divisors is an integer number (240434740).

Almost surely, 2^1825220161 is an apocalyptic number.

It is an amenable number.

1825220161 is a deficient number, since it is larger than the sum of its proper divisors (98257759).

1825220161 is a wasteful number, since it uses less digits than its factorization.

1825220161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109695.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 1825220161 is about 42722.5954384796. The cubic root of 1825220161 is about 1222.0953334353.

The spelling of 1825220161 in words is "one billion, eight hundred twenty-five million, two hundred twenty thousand, one hundred sixty-one".