213129379625 has 8 divisors (see below), whose sum is σ = 265985465928. Its totient is φ = 170503503600.

The previous prime is 213129379621. The next prime is 213129379663. The reversal of 213129379625 is 526973921312.

213129379625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 27448536976 + 185680842649 = 165676^2 + 430907^2 .

It is not a de Polignac number, because 213129379625 - 2² = 213129379621 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213129379621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 852517394 + ... + 852517643.

It is an arithmetic number, because the mean of its divisors is an integer number (33248183241).

Almost surely, 2^213129379625 is an apocalyptic number.

213129379625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213129379625 is a deficient number, since it is larger than the sum of its proper divisors (52856086303).

213129379625 is an equidigital number, since it uses as much as digits as its factorization.

213129379625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705035052 (or 1705035042 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 50.

The spelling of 213129379625 in words is "two hundred thirteen billion, one hundred twenty-nine million, three hundred seventy-nine thousand, six hundred twenty-five".