125205435215 has 32 divisors (see below), whose sum is σ = 172816809984. Its totient is φ = 85302380160.

The previous prime is 125205435209. The next prime is 125205435281. The reversal of 125205435215 is 512534502521.

It is a happy number.

It is not a de Polignac number, because 125205435215 - 2¹² = 125205431119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19817237 + ... + 19823553.

It is an arithmetic number, because the mean of its divisors is an integer number (5400525312).

Almost surely, 2^125205435215 is an apocalyptic number.

125205435215 is a deficient number, since it is larger than the sum of its proper divisors (47611374769).

125205435215 is a wasteful number, since it uses less digits than its factorization.

125205435215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9887.

The product of its (nonzero) digits is 60000, while the sum is 35.

Adding to 125205435215 its reverse (512534502521), we get a palindrome (637739937736).

The spelling of 125205435215 in words is "one hundred twenty-five billion, two hundred five million, four hundred thirty-five thousand, two hundred fifteen".