2171437425 has 36 divisors (see below), whose sum is σ = 3909108060. Its totient is φ = 1152197760.

The previous prime is 2171437409. The next prime is 2171437427. The reversal of 2171437425 is 5247341712.

2171437425 is a `hidden beast` number, since 217 + 1 + 437 + 4 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 88792929 + 2082644496 = 9423^2 + 45636^2 .

It is not a de Polignac number, because 2171437425 - 2⁴ = 2171437409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2171437425.

It is not an unprimeable number, because it can be changed into a prime (2171437427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19831 + ... + 68819.

It is an arithmetic number, because the mean of its divisors is an integer number (108586335).

Almost surely, 2^2171437425 is an apocalyptic number.

2171437425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2171437425 is a deficient number, since it is larger than the sum of its proper divisors (1737670635).

2171437425 is a wasteful number, since it uses less digits than its factorization.

2171437425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49202 (or 49194 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 2171437425 is about 46598.6847990370. The cubic root of 2171437425 is about 1294.9383899571.

The spelling of 2171437425 in words is "two billion, one hundred seventy-one million, four hundred thirty-seven thousand, four hundred twenty-five".