1830825951221 has 16 divisors (see below), whose sum is σ = 1877826554880. Its totient is φ = 1784176917120.

The previous prime is 1830825951217. The next prime is 1830825951277. The reversal of 1830825951221 is 1221595280381.

It is a cyclic number.

It is not a de Polignac number, because 1830825951221 - 2² = 1830825951217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1830825951211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10311620 + ... + 10487666.

It is an arithmetic number, because the mean of its divisors is an integer number (117364159680).

Almost surely, 2^{1830825951221} is an apocalyptic number.

It is an amenable number.

1830825951221 is a deficient number, since it is larger than the sum of its proper divisors (47000603659).

1830825951221 is a wasteful number, since it uses less digits than its factorization.

1830825951221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177044.

The product of its (nonzero) digits is 345600, while the sum is 47.

The spelling of 1830825951221 in words is "one trillion, eight hundred thirty billion, eight hundred twenty-five million, nine hundred fifty-one thousand, two hundred twenty-one".