1894931199225 has 27 divisors (see below), whose sum is σ = 3394069309839. Its totient is φ = 1010618960400.

The previous prime is 1894931199223. The next prime is 1894931199251. The reversal of 1894931199225 is 5229911394981.

The square root of 1894931199225 is 1376565.

It is a perfect power (a square), and thus also a powerful number.

1894931199225 is a `hidden beast` number, since 1 + 8 + 9 + 4 + 9 + 311 + 99 + 225 = 666.

It can be written as a sum of positive squares in only one way, i.e., 682175231721 + 1212755967504 = 825939^2 + 1101252^2 .

It is not a de Polignac number, because 1894931199225 - 2¹ = 1894931199223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1894931199223) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 20602590 + ... + 20694360.

Almost surely, 2^{1894931199225} is an apocalyptic number.

1894931199225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1894931199225 is the 1376565-th square number.

1894931199225 is the 688283-rd centered octagonal number.

It is an amenable number.

1894931199225 is a deficient number, since it is larger than the sum of its proper divisors (1499138110614).

1894931199225 is an frugal number, since it uses more digits than its factorization.

1894931199225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183558 (or 91779 counting only the distinct ones).

The product of its digits is 12597120, while the sum is 63.

The spelling of 1894931199225 in words is "one trillion, eight hundred ninety-four billion, nine hundred thirty-one million, one hundred ninety-nine thousand, two hundred twenty-five".