2194521925 has 24 divisors (see below), whose sum is σ = 2951576712. Its totient is φ = 1612032000.

The previous prime is 2194521919. The next prime is 2194521937. The reversal of 2194521925 is 5291254912.

It can be written as a sum of positive squares in 12 ways, for example, as 253414561 + 1941107364 = 15919^2 + 44058^2 .

It is not a de Polignac number, because 2194521925 - 2¹³ = 2194513733 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45546 + ... + 80395.

It is an arithmetic number, because the mean of its divisors is an integer number (122982363).

Almost surely, 2^2194521925 is an apocalyptic number.

2194521925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2194521925 is a deficient number, since it is larger than the sum of its proper divisors (757054787).

2194521925 is a wasteful number, since it uses less digits than its factorization.

2194521925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126009 (or 126004 counting only the distinct ones).

The product of its digits is 64800, while the sum is 40.

The square root of 2194521925 is about 46845.7247248882. The cubic root of 2194521925 is about 1299.5110439275.

The spelling of 2194521925 in words is "two billion, one hundred ninety-four million, five hundred twenty-one thousand, nine hundred twenty-five".